20412664 has 24 divisors (see below), whose sum is σ = 39256560. Its totient is φ = 9946304.

The previous prime is 20412649. The next prime is 20412671. The reversal of 20412664 is 46621402.

20412664 = 1122² + 1123² + ... + 1137².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87492 + ... + 87724.

It is an arithmetic number, because the mean of its divisors is an integer number (1635690).

Almost surely, 2^20412664 is an apocalyptic number.

It is an amenable number.

20412664 is a deficient number, since it is larger than the sum of its proper divisors (18843896).

20412664 is an equidigital number, since it uses as much as digits as its factorization.

20412664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20412664 is about 4518.0376271120. The cubic root of 20412664 is about 273.2959708333.

The spelling of 20412664 in words is "twenty million, four hundred twelve thousand, six hundred sixty-four".