20656454 has 16 divisors (see below), whose sum is σ = 38135328. Its totient is φ = 8171712.

The previous prime is 20656451. The next prime is 20656463. The reversal of 20656454 is 45465602.

It is a self number, because there is not a number n which added to its sum of digits gives 20656454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20656451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56567 + ... + 56930.

It is an arithmetic number, because the mean of its divisors is an integer number (2383458).

Almost surely, 2^20656454 is an apocalyptic number.

20656454 is a deficient number, since it is larger than the sum of its proper divisors (17478874).

20656454 is a wasteful number, since it uses less digits than its factorization.

20656454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113519.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 20656454 is about 4544.9371832843. The cubic root of 20656454 is about 274.3796661912.

The spelling of 20656454 in words is "twenty million, six hundred fifty-six thousand, four hundred fifty-four".