18922270220828 has 24 divisors (see below), whose sum is σ = 35697702383952. Its totient is φ = 8724416511744.

The previous prime is 18922270220813. The next prime is 18922270220831. The reversal of 18922270220828 is 82802207222981.

It is a self number, because there is not a number n which added to its sum of digits gives 18922270220828.

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, 186177350 + ... + 186278957.

It is an arithmetic number, because the mean of its divisors is an integer number (1487404265998).

Almost surely, 2^{18922270220828} is an apocalyptic number.

It is an amenable number.

18922270220828 is a deficient number, since it is larger than the sum of its proper divisors (16775432163124).

18922270220828 is a wasteful number, since it uses less digits than its factorization.

18922270220828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372457301 (or 372457299 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 53.

The spelling of 18922270220828 in words is "eighteen trillion, nine hundred twenty-two billion, two hundred seventy million, two hundred twenty thousand, eight hundred twenty-eight".