20970252 has 60 divisors (see below), whose sum is σ = 55800360. Its totient is φ = 6865344.

The previous prime is 20970247. The next prime is 20970253. The reversal of 20970252 is 25207902.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20970253) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18568 + ... + 19664.

It is an arithmetic number, because the mean of its divisors is an integer number (930006).

Almost surely, 2^20970252 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 20970252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27900180).

20970252 is an abundant number, since it is smaller than the sum of its proper divisors (34830108).

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

20970252 is a wasteful number, since it uses less digits than its factorization.

20970252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172 (or 1161 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20970252 is about 4579.3287717743. The cubic root of 20970252 is about 275.7620823036.

The spelling of 20970252 in words is "twenty million, nine hundred seventy thousand, two hundred fifty-two".