20970250 has 64 divisors (see below), whose sum is σ = 46904832. Its totient is φ = 6864000.

The previous prime is 20970247. The next prime is 20970253. The reversal of 20970250 is 5207902.

It is an interprime number because it is at equal distance from previous prime (20970247) and next prime (20970253).

It is a Harshad number since it is a multiple of its sum of digits (25).

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 31 ways as a sum of consecutive naturals, for example, 39990 + ... + 40510.

It is an arithmetic number, because the mean of its divisors is an integer number (732888).

Almost surely, 2^20970250 is an apocalyptic number.

20970250 is an abundant number, since it is smaller than the sum of its proper divisors (25934582).

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

20970250 is a wasteful number, since it uses less digits than its factorization.

20970250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 20970250 is about 4579.3285534017. The cubic root of 20970250 is about 275.7620735368.

The spelling of 20970250 in words is "twenty million, nine hundred seventy thousand, two hundred fifty".