20277306 has 48 divisors (see below), whose sum is σ = 52401024. Its totient is φ = 5540832.

The previous prime is 20277287. The next prime is 20277319. The reversal of 20277306 is 60377202.

It is a super-2 number, since 2×20277306² = 822338277235272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20277306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 601 + ... + 6396.

It is an arithmetic number, because the mean of its divisors is an integer number (1091688).

Almost surely, 2^20277306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20277306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26200512).

20277306 is an abundant number, since it is smaller than the sum of its proper divisors (32123718).

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

20277306 is a wasteful number, since it uses less digits than its factorization.

20277306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035 (or 7032 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 20277306 is about 4503.0329778939. The cubic root of 20277306 is about 272.6905482065.

The spelling of 20277306 in words is "twenty million, two hundred seventy-seven thousand, three hundred six".