20970475 has 18 divisors (see below), whose sum is σ = 26706500. Its totient is φ = 16334400.

The previous prime is 20970473. The next prime is 20970511. The reversal of 20970475 is 57407902.

It is not a de Polignac number, because 20970475 - 2¹ = 20970473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20970475.

It is not an unprimeable number, because it can be changed into a prime (20970473) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 41776 + ... + 42274.

Almost surely, 2^20970475 is an apocalyptic number.

20970475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20970475 is a deficient number, since it is larger than the sum of its proper divisors (5736025).

20970475 is an equidigital number, since it uses as much as digits as its factorization.

20970475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 20970475 is about 4579.3531202562. The cubic root of 20970475 is about 275.7630597950.

The spelling of 20970475 in words is "twenty million, nine hundred seventy thousand, four hundred seventy-five".