20958532 has 48 divisors (see below), whose sum is σ = 44271360. Its totient is φ = 8491392.

The previous prime is 20958529. The next prime is 20958541. The reversal of 20958532 is 23585902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42793 + ... + 43279.

It is an arithmetic number, because the mean of its divisors is an integer number (922320).

Almost surely, 2^20958532 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 20958532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22135680).

20958532 is an abundant number, since it is smaller than the sum of its proper divisors (23312828).

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

20958532 is a wasteful number, since it uses less digits than its factorization.

20958532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 20958532 is about 4578.0489294021. The cubic root of 20958532 is about 275.7106994544.

The spelling of 20958532 in words is "twenty million, nine hundred fifty-eight thousand, five hundred thirty-two".