20770344 has 160 divisors (see below), whose sum is σ = 70276800. Its totient is φ = 5598720.

The previous prime is 20770339. The next prime is 20770349. The reversal of 20770344 is 44307702.

It is an interprime number because it is at equal distance from previous prime (20770339) and next prime (20770349).

It is a super-4 number, since 4×20770344⁴ (a number of 30 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20770349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 86064 + ... + 86304.

It is an arithmetic number, because the mean of its divisors is an integer number (439230).

Almost surely, 2^20770344 is an apocalyptic number.

20770344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20770344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35138400).

20770344 is an abundant number, since it is smaller than the sum of its proper divisors (49506456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20770344 is a wasteful number, since it uses less digits than its factorization.

20770344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 20770344 is about 4557.4492866076. The cubic root of 20770344 is about 274.8830091899.

The spelling of 20770344 in words is "twenty million, seven hundred seventy thousand, three hundred forty-four".