21100202032 has 160 divisors (see below), whose sum is σ = 51889040000. Its totient is φ = 8258568192.

The previous prime is 21100202023. The next prime is 21100202033. The reversal of 21100202032 is 23020200112.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (21100202033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6918844 + ... + 6921892.

It is an arithmetic number, because the mean of its divisors is an integer number (324306500).

Almost surely, 2^21100202032 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 21100202032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25944520000).

21100202032 is an abundant number, since it is smaller than the sum of its proper divisors (30788837968).

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

21100202032 is a wasteful number, since it uses less digits than its factorization.

21100202032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3188 (or 3168 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21100202032 its reverse (23020200112), we get a palindrome (44120402144).

The spelling of 21100202032 in words is "twenty-one billion, one hundred million, two hundred two thousand, thirty-two".