22154313664 has 28 divisors (see below), whose sum is σ = 50242819504. Its totient is φ = 9494705664.

The previous prime is 22154313653. The next prime is 22154313689. The reversal of 22154313664 is 46631345122.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×22154313664² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24725349 + ... + 24726244.

Almost surely, 2^22154313664 is an apocalyptic number.

It is an amenable number.

22154313664 is an abundant number, since it is smaller than the sum of its proper divisors (28088505840).

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

22154313664 is an equidigital number, since it uses as much as digits as its factorization.

22154313664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49451612 (or 49451602 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

Adding to 22154313664 its reverse (46631345122), we get a palindrome (68785658786).

The spelling of 22154313664 in words is "twenty-two billion, one hundred fifty-four million, three hundred thirteen thousand, six hundred sixty-four".