18879745460 has 24 divisors (see below), whose sum is σ = 39657844296. Its totient is φ = 7549921280.

The previous prime is 18879745459. The next prime is 18879745487. The reversal of 18879745460 is 6454797881.

It can be written as a sum of positive squares in 4 ways, for example, as 4121383204 + 14758362256 = 64198^2 + 121484^2 .

It is a super-2 number, since 2×18879745460² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18879745460.

It is a congruent number.

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, 43997 + ... + 199236.

It is an arithmetic number, because the mean of its divisors is an integer number (1652410179).

Almost surely, 2^18879745460 is an apocalyptic number.

18879745460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18879745460 is an abundant number, since it is smaller than the sum of its proper divisors (20778098836).

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

18879745460 is a wasteful number, since it uses less digits than its factorization.

18879745460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247123 (or 247121 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 59.

The spelling of 18879745460 in words is "eighteen billion, eight hundred seventy-nine million, seven hundred forty-five thousand, four hundred sixty".