20000138 has 8 divisors (see below), whose sum is σ = 30166500. Its totient is φ = 9944640.

The previous prime is 20000107. The next prime is 20000147. The reversal of 20000138 is 83100002.

It can be written as a sum of positive squares in 2 ways, for example, as 18861649 + 1138489 = 4343^2 + 1067^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27263 + ... + 27986.

Almost surely, 2^20000138 is an apocalyptic number.

20000138 is a deficient number, since it is larger than the sum of its proper divisors (10166362).

20000138 is a wasteful number, since it uses less digits than its factorization.

20000138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55432.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 20000138 is about 4472.1513838420. The cubic root of 20000138 is about 271.4423859741.

The spelling of 20000138 in words is "twenty million, one hundred thirty-eight", and thus it is an aban number.