21302232032 has 12 divisors (see below), whose sum is σ = 41938769376. Its totient is φ = 10651116000.

The previous prime is 21302232019. The next prime is 21302232047. The reversal of 21302232032 is 23023220312.

It is a junction number, because it is equal to n+sod(n) for n = 21302231995 and 21302232013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332847344 + ... + 332847407.

It is an arithmetic number, because the mean of its divisors is an integer number (3494897448).

Almost surely, 2^21302232032 is an apocalyptic number.

It is an amenable number.

21302232032 is a deficient number, since it is larger than the sum of its proper divisors (20636537344).

21302232032 is an equidigital number, since it uses as much as digits as its factorization.

21302232032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665694761 (or 665694753 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21302232032 its reverse (23023220312), we get a palindrome (44325452344).

The spelling of 21302232032 in words is "twenty-one billion, three hundred two million, two hundred thirty-two thousand, thirty-two".