21438832211512 has 16 divisors (see below), whose sum is σ = 40406089209840. Its totient is φ = 10663875088896.

The previous prime is 21438832211483. The next prime is 21438832211521. The reversal of 21438832211512 is 21511223883412.

It is a super-2 number, since 2×21438832211512² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6942625468 + ... + 6942628555.

It is an arithmetic number, because the mean of its divisors is an integer number (2525380575615).

Almost surely, 2^{21438832211512} is an apocalyptic number.

It is an amenable number.

21438832211512 is a deficient number, since it is larger than the sum of its proper divisors (18967256998328).

21438832211512 is a wasteful number, since it uses less digits than its factorization.

21438832211512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13885254222 (or 13885254218 counting only the distinct ones).

The product of its digits is 184320, while the sum is 43.

The spelling of 21438832211512 in words is "twenty-one trillion, four hundred thirty-eight billion, eight hundred thirty-two million, two hundred eleven thousand, five hundred twelve".