21100332430 has 16 divisors (see below), whose sum is σ = 39290274720. Its totient is φ = 8149093792.

The previous prime is 21100332419. The next prime is 21100332433. The reversal of 21100332430 is 3423300112.

It is a junction number, because it is equal to n+sod(n) for n = 21100332398 and 21100332407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100332433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36379594 + ... + 36380173.

It is an arithmetic number, because the mean of its divisors is an integer number (2455642170).

Almost surely, 2^21100332430 is an apocalyptic number.

21100332430 is a deficient number, since it is larger than the sum of its proper divisors (18189942290).

21100332430 is a wasteful number, since it uses less digits than its factorization.

21100332430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72759803.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21100332430 its reverse (3423300112), we get a palindrome (24523632542).

The spelling of 21100332430 in words is "twenty-one billion, one hundred million, three hundred thirty-two thousand, four hundred thirty".