18735499942 has 16 divisors (see below), whose sum is σ = 29361437280. Its totient is φ = 8949362752.

The previous prime is 18735499921. The next prime is 18735499999. The reversal of 18735499942 is 24999453781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214513 + ... + 288940.

It is an arithmetic number, because the mean of its divisors is an integer number (1835089830).

Almost surely, 2^18735499942 is an apocalyptic number.

18735499942 is a deficient number, since it is larger than the sum of its proper divisors (10625937338).

18735499942 is a wasteful number, since it uses less digits than its factorization.

18735499942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504287.

The product of its digits is 19595520, while the sum is 61.

It can be divided in two parts, 187354 and 99942, that added together give a square (287296 = 536²).

The spelling of 18735499942 in words is "eighteen billion, seven hundred thirty-five million, four hundred ninety-nine thousand, nine hundred forty-two".