21423855832412 has 36 divisors (see below), whose sum is σ = 41210387816808. Its totient is φ = 9738009890400.

The previous prime is 21423855832277. The next prime is 21423855832429.

21423855832412 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59163218 + ... + 59524230.

Almost surely, 2^{21423855832412} is an apocalyptic number.

21423855832412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21423855832412 is a deficient number, since it is larger than the sum of its proper divisors (19786531984396).

21423855832412 is a wasteful number, since it uses less digits than its factorization.

21423855832412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483650 (or 483637 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 50.

It can be divided in two parts, 2142385 and 5832412, that added together give a palindrome (7974797).

The spelling of 21423855832412 in words is "twenty-one trillion, four hundred twenty-three billion, eight hundred fifty-five million, eight hundred thirty-two thousand, four hundred twelve".