21162531146264 has 32 divisors (see below), whose sum is σ = 39764475196320. Its totient is φ = 10558691490816.

The previous prime is 21162531146261. The next prime is 21162531146353. The reversal of 21162531146264 is 46264113526112.

It is a happy number.

It is a super-2 number, since 2×21162531146264² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21162531146261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7033814 + ... + 9581210.

It is an arithmetic number, because the mean of its divisors is an integer number (1242639849885).

Almost surely, 2^{21162531146264} is an apocalyptic number.

It is an amenable number.

21162531146264 is a deficient number, since it is larger than the sum of its proper divisors (18601944050056).

21162531146264 is a wasteful number, since it uses less digits than its factorization.

21162531146264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549619 (or 2549615 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The spelling of 21162531146264 in words is "twenty-one trillion, one hundred sixty-two billion, five hundred thirty-one million, one hundred forty-six thousand, two hundred sixty-four".