20755500 has 96 divisors (see below), whose sum is σ = 61483968. Its totient is φ = 5440000.

The previous prime is 20755463. The next prime is 20755507. The reversal of 20755500 is 555702.

It is not an unprimeable number, because it can be changed into a prime (20755507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151432 + ... + 151568.

It is an arithmetic number, because the mean of its divisors is an integer number (640458).

Almost surely, 2^20755500 is an apocalyptic number.

20755500 is a gapful number since it is divisible by the number (20) 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 20755500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30741984).

20755500 is an abundant number, since it is smaller than the sum of its proper divisors (40728468).

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

20755500 is a wasteful number, since it uses less digits than its factorization.

20755500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 24.

The square root of 20755500 is about 4555.8204530029. The cubic root of 20755500 is about 274.8175097801.

The spelling of 20755500 in words is "twenty million, seven hundred fifty-five thousand, five hundred".