18961222 has 16 divisors (see below), whose sum is σ = 34417440. Its totient is φ = 7648128.

The previous prime is 18961219. The next prime is 18961247. The reversal of 18961222 is 22216981.

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, 39597 + ... + 40072.

It is an arithmetic number, because the mean of its divisors is an integer number (2151090).

Almost surely, 2^18961222 is an apocalyptic number.

18961222 is a deficient number, since it is larger than the sum of its proper divisors (15456218).

18961222 is a wasteful number, since it uses less digits than its factorization.

18961222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79695.

The product of its digits is 3456, while the sum is 31.

The square root of 18961222 is about 4354.4485299519. The cubic root of 18961222 is about 266.6585056530.

The spelling of 18961222 in words is "eighteen million, nine hundred sixty-one thousand, two hundred twenty-two".