218432137883460 has 48 divisors (see below), whose sum is σ = 618978781100736. Its totient is φ = 57546780099712.

The previous prime is 218432137883459. The next prime is 218432137883489. The reversal of 218432137883460 is 64388731234812.

It is a super-4 number, since 4×218432137883460⁴ (a number of 58 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 218432137883394 and 218432137883403.

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, 21930932559 + ... + 21930942518.

It is an arithmetic number, because the mean of its divisors is an integer number (12895391272932).

Almost surely, 2^{218432137883460} is an apocalyptic number.

218432137883460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218432137883460 is an abundant number, since it is smaller than the sum of its proper divisors (400546643217276).

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

218432137883460 is a wasteful number, since it uses less digits than its factorization.

218432137883460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43861875172 (or 43861875170 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 60.

The spelling of 218432137883460 in words is "two hundred eighteen trillion, four hundred thirty-two billion, one hundred thirty-seven million, eight hundred eighty-three thousand, four hundred sixty".