20901170 has 16 divisors (see below), whose sum is σ = 38919960. Its totient is φ = 8072064.

The previous prime is 20901157. The next prime is 20901173. The reversal of 20901170 is 7110902.

It can be written as a sum of positive squares in 4 ways, for example, as 20349121 + 552049 = 4511^2 + 743^2 .

It is not an unprimeable number, because it can be changed into a prime (20901173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35747 + ... + 36326.

Almost surely, 2^20901170 is an apocalyptic number.

20901170 is a deficient number, since it is larger than the sum of its proper divisors (18018790).

20901170 is a wasteful number, since it uses less digits than its factorization.

20901170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72109.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 20901170 is about 4571.7797409762. The cubic root of 20901170 is about 275.4589361537.

The spelling of 20901170 in words is "twenty million, nine hundred one thousand, one hundred seventy".