21032402104 has 96 divisors (see below), whose sum is σ = 47488204800. Its totient is φ = 8698415040.

The previous prime is 21032402059. The next prime is 21032402113. The reversal of 21032402104 is 40120423012.

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, 4651957 + ... + 4656475.

It is an arithmetic number, because the mean of its divisors is an integer number (494668800).

Almost surely, 2^21032402104 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 21032402104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23744102400).

21032402104 is an abundant number, since it is smaller than the sum of its proper divisors (26455802696).

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

21032402104 is a wasteful number, since it uses less digits than its factorization.

21032402104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4953 (or 4942 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21032402104 its reverse (40120423012), we get a palindrome (61152825116).

The spelling of 21032402104 in words is "twenty-one billion, thirty-two million, four hundred two thousand, one hundred four".