20970495 has 80 divisors (see below), whose sum is σ = 46347840. Its totient is φ = 8833536.

The previous prime is 20970473. The next prime is 20970511. The reversal of 20970495 is 59407902.

It is not a de Polignac number, because 20970495 - 2¹⁰ = 20969471 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 36571 + ... + 37139.

It is an arithmetic number, because the mean of its divisors is an integer number (579348).

Almost surely, 2^20970495 is an apocalyptic number.

20970495 is an abundant number, since it is smaller than the sum of its proper divisors (25377345).

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

20970495 is a wasteful number, since it uses less digits than its factorization.

20970495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 20970495 is about 4579.3553039702. The cubic root of 20970495 is about 275.7631474621.

The spelling of 20970495 in words is "twenty million, nine hundred seventy thousand, four hundred ninety-five".