18787049072 has 40 divisors (see below), whose sum is σ = 40458236400. Its totient is φ = 8378439680.

The previous prime is 18787049059. The next prime is 18787049077. The reversal of 18787049072 is 27094078781.

It is a super-2 number, since 2×18787049072² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18787049077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 997697 + ... + 1016352.

It is an arithmetic number, because the mean of its divisors is an integer number (1011455910).

Almost surely, 2^18787049072 is an apocalyptic number.

It is an amenable number.

18787049072 is an abundant number, since it is smaller than the sum of its proper divisors (21671187328).

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

18787049072 is a wasteful number, since it uses less digits than its factorization.

18787049072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014121 (or 2014115 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 53.

The spelling of 18787049072 in words is "eighteen billion, seven hundred eighty-seven million, forty-nine thousand, seventy-two".