20970072 has 48 divisors (see below), whose sum is σ = 59787000. Its totient is φ = 6621696.

The previous prime is 20970071. The next prime is 20970073. The reversal of 20970072 is 27007902.

It is an interprime number because it is at equal distance from previous prime (20970071) and next prime (20970073).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20970071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6297 + ... + 9032.

Almost surely, 2^20970072 is an apocalyptic number.

It is an amenable number.

20970072 is an abundant number, since it is smaller than the sum of its proper divisors (38816928).

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

20970072 is a wasteful number, since it uses less digits than its factorization.

20970072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15360 (or 15353 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 20970072 is about 4579.3091181968. The cubic root of 20970072 is about 275.7612932920.

Adding to 20970072 its reverse (27007902), we get a palindrome (47977974).

The spelling of 20970072 in words is "twenty million, nine hundred seventy thousand, seventy-two".