18622969156 has 27 divisors (see below), whose sum is σ = 35828057503. Its totient is φ = 8463621320.

The previous prime is 18622969151. The next prime is 18622969163. The reversal of 18622969156 is 65196922681.

The square root of 18622969156 is 136466.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18622969097 and 18622969106.

It is not an unprimeable number, because it can be changed into a prime (18622969151) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2999151 + ... + 3005353.

Almost surely, 2^18622969156 is an apocalyptic number.

18622969156 is the 136466-th square number.

It is an amenable number.

18622969156 is a deficient number, since it is larger than the sum of its proper divisors (17205088347).

18622969156 is an frugal number, since it uses more digits than its factorization.

18622969156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12432 (or 6216 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 55.

The spelling of 18622969156 in words is "eighteen billion, six hundred twenty-two million, nine hundred sixty-nine thousand, one hundred fifty-six".