21302124032 has 80 divisors (see below), whose sum is σ = 48752317152. Its totient is φ = 9108971520.

The previous prime is 21302124017. The next prime is 21302124047. The reversal of 21302124032 is 23042120312.

It is an interprime number because it is at equal distance from previous prime (21302124017) and next prime (21302124047).

It is a junction number, because it is equal to n+sod(n) for n = 21302123995 and 21302124013.

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, 1645778 + ... + 1658670.

Almost surely, 2^21302124032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21302124032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24376158576).

21302124032 is an abundant number, since it is smaller than the sum of its proper divisors (27450193120).

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

21302124032 is an equidigital number, since it uses as much as digits as its factorization.

21302124032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13379 (or 13363 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21302124032 its reverse (23042120312), we get a palindrome (44344244344).

The spelling of 21302124032 in words is "twenty-one billion, three hundred two million, one hundred twenty-four thousand, thirty-two".