20139010 has 16 divisors (see below), whose sum is σ = 36370296. Its totient is φ = 8028928.

The previous prime is 20138981. The next prime is 20139011. The reversal of 20139010 is 1093102.

It can be written as a sum of positive squares in 4 ways, for example, as 10634121 + 9504889 = 3261^2 + 3083^2 .

It is not an unprimeable number, because it can be changed into a prime (20139011) 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, 7 + ... + 6346.

Almost surely, 2^20139010 is an apocalyptic number.

20139010 is a deficient number, since it is larger than the sum of its proper divisors (16231286).

20139010 is a wasteful number, since it uses less digits than its factorization.

20139010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6677.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 20139010 is about 4487.6508331197. The cubic root of 20139010 is about 272.0691955587.

The spelling of 20139010 in words is "twenty million, one hundred thirty-nine thousand, ten".