18900000678 has 32 divisors (see below), whose sum is σ = 41573822976. Its totient is φ = 5691652128.

The previous prime is 18900000677. The next prime is 18900000683. The reversal of 18900000678 is 87600000981.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18900000677) 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, 2574076 + ... + 2581407.

It is an arithmetic number, because the mean of its divisors is an integer number (1299181968).

Almost surely, 2^18900000678 is an apocalyptic number.

18900000678 is an abundant number, since it is smaller than the sum of its proper divisors (22673822298).

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

18900000678 is a wasteful number, since it uses less digits than its factorization.

18900000678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5155548.

The product of its (nonzero) digits is 24192, while the sum is 39.

The spelling of 18900000678 in words is "eighteen billion, nine hundred million, six hundred seventy-eight", and thus it is an aban number.