20455932 has 72 divisors (see below), whose sum is σ = 58477440. Its totient is φ = 5533920.

The previous prime is 20455927. The next prime is 20455943. The reversal of 20455932 is 23955402.

It is a self number, because there is not a number n which added to its sum of digits gives 20455932.

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, 10257 + ... + 12087.

Almost surely, 2^20455932 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 20455932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29238720).

20455932 is an abundant number, since it is smaller than the sum of its proper divisors (38021508).

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

20455932 is a wasteful number, since it uses less digits than its factorization.

20455932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871 (or 1862 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 20455932 is about 4522.8234544364. The cubic root of 20455932 is about 273.4889331516.

The spelling of 20455932 in words is "twenty million, four hundred fifty-five thousand, nine hundred thirty-two".