20970670 has 32 divisors (see below), whose sum is σ = 44149248. Its totient is φ = 7021728.

The previous prime is 20970667. The next prime is 20970679. The reversal of 20970670 is 7607902.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20970679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474 + ... + 6493.

It is an arithmetic number, because the mean of its divisors is an integer number (1379664).

Almost surely, 2^20970670 is an apocalyptic number.

20970670 is an abundant number, since it is smaller than the sum of its proper divisors (23178578).

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

20970670 is a wasteful number, since it uses less digits than its factorization.

20970670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7024.

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

The square root of 20970670 is about 4579.3744114235. The cubic root of 20970670 is about 275.7639145464.

The spelling of 20970670 in words is "twenty million, nine hundred seventy thousand, six hundred seventy".