22161423906 has 40 divisors (see below), whose sum is σ = 49789167120. Its totient is φ = 7367629752.

The previous prime is 22161423863. The next prime is 22161423917. The reversal of 22161423906 is 60932416122.

It is a happy number.

22161423906 is a `hidden beast` number, since 2 + 2 + 1 + 614 + 2 + 39 + 0 + 6 = 666.

It is a super-2 number, since 2×22161423906² (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 (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 119076 + ... + 241871.

It is an arithmetic number, because the mean of its divisors is an integer number (1244729178).

Almost surely, 2^22161423906 is an apocalyptic number.

22161423906 is an abundant number, since it is smaller than the sum of its proper divisors (27627743214).

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

22161423906 is a wasteful number, since it uses less digits than its factorization.

22161423906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361340 (or 361331 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 22161423906 in words is "twenty-two billion, one hundred sixty-one million, four hundred twenty-three thousand, nine hundred six".