20670970 has 16 divisors (see below), whose sum is σ = 38116008. Its totient is φ = 8066560.

The previous prime is 20670959. The next prime is 20670983. The reversal of 20670970 is 7907602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9320809 + 11350161 = 3053^2 + 3369^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24799 + ... + 25618.

Almost surely, 2^20670970 is an apocalyptic number.

20670970 is a deficient number, since it is larger than the sum of its proper divisors (17445038).

20670970 is a wasteful number, since it uses less digits than its factorization.

20670970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50465.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 20670970 is about 4546.5338445897. The cubic root of 20670970 is about 274.4439231482.

The spelling of 20670970 in words is "twenty million, six hundred seventy thousand, nine hundred seventy".