20765120 has 28 divisors (see below), whose sum is σ = 49447704. Its totient is φ = 8305920.

The previous prime is 20765089. The next prime is 20765123. The reversal of 20765120 is 2156702.

It is a super-2 number, since 2×20765120² = 862380417228800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20765123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32126 + ... + 32765.

Almost surely, 2^20765120 is an apocalyptic number.

20765120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20765120 is an abundant number, since it is smaller than the sum of its proper divisors (28682584).

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

20765120 is an equidigital number, since it uses as much as digits as its factorization.

20765120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64908 (or 64898 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20765120 is about 4556.8761229597. The cubic root of 20765120 is about 274.8599617583.

The spelling of 20765120 in words is "twenty million, seven hundred sixty-five thousand, one hundred twenty".