21423032412 has 48 divisors (see below), whose sum is σ = 51384752160. Its totient is φ = 6941693952.

The previous prime is 21423032401. The next prime is 21423032459.

It is a happy number.

21423032412 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 15 ways as a sum of consecutive naturals, for example, 479908 + ... + 522644.

It is an arithmetic number, because the mean of its divisors is an integer number (1070515670).

Almost surely, 2^21423032412 is an apocalyptic number.

It is an amenable number.

21423032412 is an abundant number, since it is smaller than the sum of its proper divisors (29961719748).

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

21423032412 is a wasteful number, since it uses less digits than its factorization.

21423032412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43910 (or 43908 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

It can be divided in two parts, 214230 and 32412, that added together give a palindrome (246642).

The spelling of 21423032412 in words is "twenty-one billion, four hundred twenty-three million, thirty-two thousand, four hundred twelve".