18978361704 has 48 divisors (see below), whose sum is σ = 51421296420. Its totient is φ = 6323466240.

The previous prime is 18978361697. The next prime is 18978361709. The reversal of 18978361704 is 40716387981.

18978361704 is a `hidden beast` number, since 18 + 9 + 7 + 8 + 3 + 617 + 0 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15853328100 + 3125033604 = 125910^2 + 55902^2 .

It is not an unprimeable number, because it can be changed into a prime (18978361709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121384 + ... + 229544.

Almost surely, 2^18978361704 is an apocalyptic number.

It is an amenable number.

18978361704 is an abundant number, since it is smaller than the sum of its proper divisors (32442934716).

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

18978361704 is a wasteful number, since it uses less digits than its factorization.

18978361704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110610 (or 110603 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 18978361704 in words is "eighteen billion, nine hundred seventy-eight million, three hundred sixty-one thousand, seven hundred four".