20454664 has 16 divisors (see below), whose sum is σ = 38408400. Its totient is φ = 10212432.

The previous prime is 20454653. The next prime is 20454671. The reversal of 20454664 is 46645402.

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, 5847 + ... + 8665.

It is an arithmetic number, because the mean of its divisors is an integer number (2400525).

Almost surely, 2^20454664 is an apocalyptic number.

It is an amenable number.

20454664 is a deficient number, since it is larger than the sum of its proper divisors (17953736).

20454664 is a wasteful number, since it uses less digits than its factorization.

20454664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732 (or 3728 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 20454664 is about 4522.6832743406. The cubic root of 20454664 is about 273.4832821236.

The spelling of 20454664 in words is "twenty million, four hundred fifty-four thousand, six hundred sixty-four".