20913152 has 44 divisors (see below), whose sum is σ = 45050376. Its totient is φ = 9646080.

The previous prime is 20913149. The next prime is 20913173. The reversal of 20913152 is 25131902.

It is a congruent number.

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, 12527 + ... + 14097.

Almost surely, 2^20913152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20913152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22525188).

20913152 is an abundant number, since it is smaller than the sum of its proper divisors (24137224).

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

20913152 is a wasteful number, since it uses less digits than its factorization.

20913152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604 (or 1586 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 20913152 is about 4573.0899838074. The cubic root of 20913152 is about 275.5115634862.

The spelling of 20913152 in words is "twenty million, nine hundred thirteen thousand, one hundred fifty-two".