20138750 has 20 divisors (see below), whose sum is σ = 37750416. Its totient is φ = 8055000.

The previous prime is 20138743. The next prime is 20138801. The reversal of 20138750 is 5783102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6806 + ... + 9305.

Almost surely, 2^20138750 is an apocalyptic number.

20138750 is a deficient number, since it is larger than the sum of its proper divisors (17611666).

20138750 is an equidigital number, since it uses as much as digits as its factorization.

20138750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16133 (or 16118 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20138750 is about 4487.6218646406. The cubic root of 20138750 is about 272.0680247250.

The spelling of 20138750 in words is "twenty million, one hundred thirty-eight thousand, seven hundred fifty".