21363124432 has 40 divisors (see below), whose sum is σ = 44801335656. Its totient is φ = 9809834496.

The previous prime is 21363124423. The next prime is 21363124469. The reversal of 21363124432 is 23442136312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5734124176 + 15629000256 = 75724^2 + 125016^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21363124394 and 21363124403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219703 + ... + 301654.

Almost surely, 2^21363124432 is an apocalyptic number.

It is an amenable number.

21363124432 is an abundant number, since it is smaller than the sum of its proper divisors (23438211224).

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

21363124432 is a wasteful number, since it uses less digits than its factorization.

21363124432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521575 (or 521569 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

The spelling of 21363124432 in words is "twenty-one billion, three hundred sixty-three million, one hundred twenty-four thousand, four hundred thirty-two".