20155776 has 32 divisors (see below), whose sum is σ = 53539800. Its totient is φ = 6718464.

The previous prime is 20155771. The next prime is 20155799. The reversal of 20155776 is 67755102.

It is a tau number, because it is divible by the number of its divisors (32).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155771) 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, 25861 + ... + 26628.

Almost surely, 2^20155776 is an apocalyptic number.

It is an amenable number.

20155776 is an abundant number, since it is smaller than the sum of its proper divisors (33384024).

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

20155776 is an equidigital number, since it uses as much as digits as its factorization.

20155776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52506 (or 52494 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 20155776 is about 4489.5184597014. The cubic root of 20155776 is about 272.1446750531.

The spelling of 20155776 in words is "twenty million, one hundred fifty-five thousand, seven hundred seventy-six".