18742157604 has 27 divisors (see below), whose sum is σ = 47378085937. Its totient is φ = 6247112064.

The previous prime is 18742157561. The next prime is 18742157611. The reversal of 18742157604 is 40675124781.

The square root of 18742157604 is 136902.

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

18742157604 is a `hidden beast` number, since 1 + 8 + 74 + 2 + 1 + 576 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18689624100 + 52533504 = 136710^2 + 7248^2 .

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 18742157604.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 810004 + ... + 832820.

Almost surely, 2^18742157604 is an apocalyptic number.

18742157604 is the 136902-nd square number.

It is an amenable number.

18742157604 is an abundant number, since it is smaller than the sum of its proper divisors (28635928333).

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

18742157604 is an frugal number, since it uses more digits than its factorization.

18742157604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45644 (or 22822 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

It can be divided in two parts, 187421 and 57604, that added together give a square (245025 = 495²).

The spelling of 18742157604 in words is "eighteen billion, seven hundred forty-two million, one hundred fifty-seven thousand, six hundred four".