18747307386 has 32 divisors (see below), whose sum is σ = 42282492480. Its totient is φ = 6155831088.

The previous prime is 18747307373. The next prime is 18747307387. The reversal of 18747307386 is 68370374781.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18747307387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2587221 + ... + 2594456.

It is an arithmetic number, because the mean of its divisors is an integer number (1321327890).

Almost surely, 2^18747307386 is an apocalyptic number.

18747307386 is an abundant number, since it is smaller than the sum of its proper divisors (23535185094).

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

18747307386 is a wasteful number, since it uses less digits than its factorization.

18747307386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5181755 (or 5181749 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 18747307386 in words is "eighteen billion, seven hundred forty-seven million, three hundred seven thousand, three hundred eighty-six".