21613202232 has 32 divisors (see below), whose sum is σ = 55776007680. Its totient is φ = 6972000480.

The previous prime is 21613202227. The next prime is 21613202243. The reversal of 21613202232 is 23220231612.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 14524258 + ... + 14525745.

It is an arithmetic number, because the mean of its divisors is an integer number (1743000240).

Almost surely, 2^21613202232 is an apocalyptic number.

It is an amenable number.

21613202232 is an abundant number, since it is smaller than the sum of its proper divisors (34162805448).

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

21613202232 is a wasteful number, since it uses less digits than its factorization.

21613202232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29050043 (or 29050039 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21613202232 its reverse (23220231612), we get a palindrome (44833433844).

The spelling of 21613202232 in words is "twenty-one billion, six hundred thirteen million, two hundred two thousand, two hundred thirty-two".