223618166320 has 20 divisors (see below), whose sum is σ = 519912236880. Its totient is φ = 89447266496.

The previous prime is 223618166281. The next prime is 223618166329. The reversal of 223618166320 is 23661816322.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (223618166329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397613460 + ... + 1397613619.

It is an arithmetic number, because the mean of its divisors is an integer number (25995611844).

Almost surely, 2^223618166320 is an apocalyptic number.

223618166320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223618166320 is an abundant number, since it is smaller than the sum of its proper divisors (296294070560).

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

223618166320 is a wasteful number, since it uses less digits than its factorization.

223618166320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795227092 (or 2795227086 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 223618166320 in words is "two hundred twenty-three billion, six hundred eighteen million, one hundred sixty-six thousand, three hundred twenty".