18375429136 has 15 divisors (see below), whose sum is σ = 35603444541. Its totient is φ = 9187443456.

The previous prime is 18375429097. The next prime is 18375429139. The reversal of 18375429136 is 63192457381.

The square root of 18375429136 is 135556.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 17518110736 + 857318400 = 132356^2 + 29280^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18375429136.

It is not an unprimeable number, because it can be changed into a prime (18375429139) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 525280 + ... + 559168.

Almost surely, 2^18375429136 is an apocalyptic number.

18375429136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18375429136 is the 135556-th square number.

It is an amenable number.

18375429136 is a deficient number, since it is larger than the sum of its proper divisors (17228015405).

18375429136 is an frugal number, since it uses more digits than its factorization.

18375429136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67786 (or 33891 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

Multiplying 18375429136 by its sum of digits (49), we get a square (900396027664 = 948892²).

The spelling of 18375429136 in words is "eighteen billion, three hundred seventy-five million, four hundred twenty-nine thousand, one hundred thirty-six".