20670475 has 24 divisors (see below), whose sum is σ = 30310560. Its totient is φ = 13681920.

The previous prime is 20670467. The next prime is 20670479. The reversal of 20670475 is 57407602.

It is not a de Polignac number, because 20670475 - 2³ = 20670467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20670479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3039 + ... + 7111.

It is an arithmetic number, because the mean of its divisors is an integer number (1262940).

Almost surely, 2^20670475 is an apocalyptic number.

20670475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20670475 is a deficient number, since it is larger than the sum of its proper divisors (9640085).

20670475 is a wasteful number, since it uses less digits than its factorization.

20670475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4119 (or 4114 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 20670475 is about 4546.4794071897. The cubic root of 20670475 is about 274.4417324620.

The spelling of 20670475 in words is "twenty million, six hundred seventy thousand, four hundred seventy-five".