18875011725 has 18 divisors (see below), whose sum is σ = 33807243626. Its totient is φ = 10066672800.

The previous prime is 18875011703. The next prime is 18875011759. The reversal of 18875011725 is 52711057881.

It can be written as a sum of positive squares in 3 ways, for example, as 2022084 + 18872989641 = 1422^2 + 137379^2 .

It is not a de Polignac number, because 18875011725 - 2⁵ = 18875011693 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 41944246 + ... + 41944695.

Almost surely, 2^18875011725 is an apocalyptic number.

18875011725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18875011725 is a deficient number, since it is larger than the sum of its proper divisors (14932231901).

18875011725 is a wasteful number, since it uses less digits than its factorization.

18875011725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83888957 (or 83888949 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 45.

The spelling of 18875011725 in words is "eighteen billion, eight hundred seventy-five million, eleven thousand, seven hundred twenty-five".