20256624 has 120 divisors (see below), whose sum is σ = 60121152. Its totient is φ = 6359040.

The previous prime is 20256619. The next prime is 20256631. The reversal of 20256624 is 42665202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 277452 + ... + 277524.

Almost surely, 2^20256624 is an apocalyptic number.

20256624 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 20256624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30060576).

20256624 is an abundant number, since it is smaller than the sum of its proper divisors (39864528).

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

20256624 is a wasteful number, since it uses less digits than its factorization.

20256624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 20256624 is about 4500.7359398214. The cubic root of 20256624 is about 272.5978057016.

It can be divided in two parts, 2025 and 6624, that added together give a square (8649 = 93²).

The spelling of 20256624 in words is "twenty million, two hundred fifty-six thousand, six hundred twenty-four".