21945736162 has 16 divisors (see below), whose sum is σ = 37831440960. Its totient is φ = 9352770768.

The previous prime is 21945736159. The next prime is 21945736171. The reversal of 21945736162 is 26163754912.

It is a happy number.

It is a super-2 number, since 2×21945736162² (a number of 21 digits) contains 22 as substring.

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, 4376133 + ... + 4381144.

It is an arithmetic number, because the mean of its divisors is an integer number (2364465060).

Almost surely, 2^21945736162 is an apocalyptic number.

21945736162 is a deficient number, since it is larger than the sum of its proper divisors (15885704798).

21945736162 is a wasteful number, since it uses less digits than its factorization.

21945736162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8757465.

The product of its digits is 544320, while the sum is 46.

The spelling of 21945736162 in words is "twenty-one billion, nine hundred forty-five million, seven hundred thirty-six thousand, one hundred sixty-two".