22161195812 has 48 divisors (see below), whose sum is σ = 45126278400. Its totient is φ = 9325929600.

The previous prime is 22161195787. The next prime is 22161195827. The reversal of 22161195812 is 21859116122.

It is a super-2 number, since 2×22161195812² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1012262 + ... + 1033922.

It is an arithmetic number, because the mean of its divisors is an integer number (940130800).

Almost surely, 2^22161195812 is an apocalyptic number.

It is an amenable number.

22161195812 is an abundant number, since it is smaller than the sum of its proper divisors (22965082588).

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

22161195812 is a wasteful number, since it uses less digits than its factorization.

22161195812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22332 (or 22330 counting only the distinct ones).

The product of its digits is 17280, while the sum is 38.

The spelling of 22161195812 in words is "twenty-two billion, one hundred sixty-one million, one hundred ninety-five thousand, eight hundred twelve".