21313102032 has 120 divisors (see below), whose sum is σ = 60986525184. Its totient is φ = 6945184512.

The previous prime is 21313101923. The next prime is 21313102049. The reversal of 21313102032 is 23020131312.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21313101996 and 21313102014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9629758 + ... + 9631970.

Almost surely, 2^21313102032 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 21313102032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30493262592).

21313102032 is an abundant number, since it is smaller than the sum of its proper divisors (39673423152).

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

21313102032 is a wasteful number, since it uses less digits than its factorization.

21313102032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3697 (or 3688 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21313102032 its reverse (23020131312), we get a palindrome (44333233344).

The spelling of 21313102032 in words is "twenty-one billion, three hundred thirteen million, one hundred two thousand, thirty-two".