20670507 has 24 divisors (see below), whose sum is σ = 35079408. Its totient is φ = 11563200.

The previous prime is 20670497. The next prime is 20670509. The reversal of 20670507 is 70507602.

It is not a de Polignac number, because 20670507 - 2⁷ = 20670379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20670509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6744 + ... + 9317.

It is an arithmetic number, because the mean of its divisors is an integer number (1461642).

Almost surely, 2^20670507 is an apocalyptic number.

20670507 is a deficient number, since it is larger than the sum of its proper divisors (14408901).

20670507 is a wasteful number, since it uses less digits than its factorization.

20670507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16091 (or 16088 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 20670507 is about 4546.4829263949. The cubic root of 20670507 is about 274.4418740831.

The spelling of 20670507 in words is "twenty million, six hundred seventy thousand, five hundred seven".