18968867720 has 32 divisors (see below), whose sum is σ = 46559949120. Its totient is φ = 6897769920.

The previous prime is 18968867677. The next prime is 18968867761. The reversal of 18968867720 is 2776886981.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21555092 + ... + 21555971.

It is an arithmetic number, because the mean of its divisors is an integer number (1454998410).

Almost surely, 2^18968867720 is an apocalyptic number.

18968867720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18968867720 is an abundant number, since it is smaller than the sum of its proper divisors (27591081400).

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

18968867720 is a wasteful number, since it uses less digits than its factorization.

18968867720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43111085 (or 43111081 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 62.

It can be divided in two parts, 18968 and 867720, that added together give a palindrome (886688).

The spelling of 18968867720 in words is "eighteen billion, nine hundred sixty-eight million, eight hundred sixty-seven thousand, seven hundred twenty".