20970504 has 24 divisors (see below), whose sum is σ = 56795310. Its totient is φ = 6990144.

The previous prime is 20970473. The next prime is 20970511. The reversal of 20970504 is 40507902.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 2566404 = 4290^2 + 1602^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 145557 + ... + 145700.

Almost surely, 2^20970504 is an apocalyptic number.

20970504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20970504 is an abundant number, since it is smaller than the sum of its proper divisors (35824806).

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

20970504 is a wasteful number, since it uses less digits than its factorization.

20970504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291269 (or 291262 counting only the distinct ones).

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

The square root of 20970504 is about 4579.3562866412. The cubic root of 20970504 is about 275.7631869122.

The spelling of 20970504 in words is "twenty million, nine hundred seventy thousand, five hundred four".