18686870037 has 24 divisors (see below), whose sum is σ = 29509103520. Its totient is φ = 11301096480.

The previous prime is 18686869973. The next prime is 18686870051. The reversal of 18686870037 is 73007868681.

It is not a de Polignac number, because 18686870037 - 2⁶ = 18686869973 is a prime.

It is a super-2 number, since 2×18686870037² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18686870537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 155862 + ... + 248327.

It is an arithmetic number, because the mean of its divisors is an integer number (1229545980).

Almost surely, 2^18686870037 is an apocalyptic number.

It is an amenable number.

18686870037 is a deficient number, since it is larger than the sum of its proper divisors (10822233483).

18686870037 is a wasteful number, since it uses less digits than its factorization.

18686870037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404673 (or 404670 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 18686870037 in words is "eighteen billion, six hundred eighty-six million, eight hundred seventy thousand, thirty-seven".