18884856984 has 64 divisors (see below), whose sum is σ = 53970666240. Its totient is φ = 5394280320.

The previous prime is 18884856973. The next prime is 18884857001. The reversal of 18884856984 is 48965848881.

It is a super-2 number, since 2×18884856984² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 761094 + ... + 785514.

It is an arithmetic number, because the mean of its divisors is an integer number (843291660).

Almost surely, 2^18884856984 is an apocalyptic number.

18884856984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18884856984 is an abundant number, since it is smaller than the sum of its proper divisors (35085809256).

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

18884856984 is a wasteful number, since it uses less digits than its factorization.

18884856984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29040 (or 29036 counting only the distinct ones).

The product of its digits is 141557760, while the sum is 69.

The spelling of 18884856984 in words is "eighteen billion, eight hundred eighty-four million, eight hundred fifty-six thousand, nine hundred eighty-four".