20264555 has 4 divisors (see below), whose sum is σ = 24317472. Its totient is φ = 16211640.

The previous prime is 20264551. The next prime is 20264593. The reversal of 20264555 is 55546202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20264555 - 2² = 20264551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20264551) 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, 2026451 + ... + 2026460.

It is an arithmetic number, because the mean of its divisors is an integer number (6079368).

Almost surely, 2^20264555 is an apocalyptic number.

20264555 is a deficient number, since it is larger than the sum of its proper divisors (4052917).

20264555 is an equidigital number, since it uses as much as digits as its factorization.

20264555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052916.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 20264555 is about 4501.6169317258. The cubic root of 20264555 is about 272.6333774583.

The spelling of 20264555 in words is "twenty million, two hundred sixty-four thousand, five hundred fifty-five".