18496772280 has 128 divisors (see below), whose sum is σ = 70463923200. Its totient is φ = 4227831936.

The previous prime is 18496772207. The next prime is 18496772291. The reversal of 18496772280 is 8227769481.

It is a happy number.

18496772280 is a `hidden beast` number, since 1 + 8 + 496 + 7 + 72 + 2 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1215772 + ... + 1230891.

It is an arithmetic number, because the mean of its divisors is an integer number (550499400).

Almost surely, 2^18496772280 is an apocalyptic number.

18496772280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18496772280 is an abundant number, since it is smaller than the sum of its proper divisors (51967150920).

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

18496772280 is a wasteful number, since it uses less digits than its factorization.

18496772280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446690 (or 2446680 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 18496772280 in words is "eighteen billion, four hundred ninety-six million, seven hundred seventy-two thousand, two hundred eighty".