20460864 has 56 divisors (see below), whose sum is σ = 55055008. Its totient is φ = 6704640.

The previous prime is 20460859. The next prime is 20460871. The reversal of 20460864 is 46806402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10839 + ... + 12585.

Almost surely, 2^20460864 is an apocalyptic number.

20460864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20460864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27527504).

20460864 is an abundant number, since it is smaller than the sum of its proper divisors (34594144).

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

20460864 is a wasteful number, since it uses less digits than its factorization.

20460864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823 (or 1813 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 20460864 is about 4523.3686562119. The cubic root of 20460864 is about 273.5109111126.

The spelling of 20460864 in words is "twenty million, four hundred sixty thousand, eight hundred sixty-four".