21865336514132 has 12 divisors (see below), whose sum is σ = 38275683227796. Its totient is φ = 10929427020480.

The previous prime is 21865336514113. The next prime is 21865336514179. The reversal of 21865336514132 is 23141563356812.

It can be written as a sum of positive squares in 2 ways, for example, as 11394378309136 + 10470958204996 = 3375556^2 + 3235886^2 .

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

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, 810293969 + ... + 810320952.

It is an arithmetic number, because the mean of its divisors is an integer number (3189640268983).

Almost surely, 2^{21865336514132} is an apocalyptic number.

It is an amenable number.

21865336514132 is a deficient number, since it is larger than the sum of its proper divisors (16410346713664).

21865336514132 is a wasteful number, since it uses less digits than its factorization.

21865336514132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620618298 (or 1620618296 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 50.

The spelling of 21865336514132 in words is "twenty-one trillion, eight hundred sixty-five billion, three hundred thirty-six million, five hundred fourteen thousand, one hundred thirty-two".