18139343250 has 64 divisors (see below), whose sum is σ = 51743787264. Its totient is φ = 4146134400.

The previous prime is 18139343221. The next prime is 18139343267. The reversal of 18139343250 is 5234393181.

It is a happy number.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18139343199 and 18139343208.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1722307 + ... + 1732806.

It is an arithmetic number, because the mean of its divisors is an integer number (808496676).

Almost surely, 2^18139343250 is an apocalyptic number.

18139343250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18139343250 is an abundant number, since it is smaller than the sum of its proper divisors (33604444014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18139343250 is a wasteful number, since it uses less digits than its factorization.

18139343250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455140 (or 3455130 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 18139343250 in words is "eighteen billion, one hundred thirty-nine million, three hundred forty-three thousand, two hundred fifty".