20155456 has 28 divisors (see below), whose sum is σ = 41290240. Its totient is φ = 9751680.

The previous prime is 20155441. The next prime is 20155481. The reversal of 20155456 is 65455102.

20155456 = 9² + 10² + ... + 392².

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3096 + ... + 7063.

Almost surely, 2^20155456 is an apocalyptic number.

It is an amenable number.

20155456 is an abundant number, since it is smaller than the sum of its proper divisors (21134784).

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

20155456 is a wasteful number, since it uses less digits than its factorization.

20155456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10202 (or 10192 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 20155456 is about 4489.4828209940. The cubic root of 20155456 is about 272.1432348248.

The spelling of 20155456 in words is "twenty million, one hundred fifty-five thousand, four hundred fifty-six".