18942918012 has 72 divisors (see below), whose sum is σ = 49298237520. Its totient is φ = 6290356320.

The previous prime is 18942917957. The next prime is 18942918017. The reversal of 18942918012 is 21081924981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18942918017) 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, 10177962 + ... + 10179822.

Almost surely, 2^18942918012 is an apocalyptic number.

18942918012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18942918012 is an abundant number, since it is smaller than the sum of its proper divisors (30355319508).

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

18942918012 is a wasteful number, since it uses less digits than its factorization.

18942918012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488 (or 2173 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 18942918012 in words is "eighteen billion, nine hundred forty-two million, nine hundred eighteen thousand, twelve".