21320100430 has 16 divisors (see below), whose sum is σ = 38558062224. Its totient is φ = 8487622080.

The previous prime is 21320100421. The next prime is 21320100463. The reversal of 21320100430 is 3400102312.

It is a happy number.

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, 5050047 + ... + 5054266.

It is an arithmetic number, because the mean of its divisors is an integer number (2409878889).

Almost surely, 2^21320100430 is an apocalyptic number.

21320100430 is a deficient number, since it is larger than the sum of its proper divisors (17237961794).

21320100430 is a wasteful number, since it uses less digits than its factorization.

21320100430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10104531.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21320100430 its reverse (3400102312), we get a palindrome (24720202742).

The spelling of 21320100430 in words is "twenty-one billion, three hundred twenty million, one hundred thousand, four hundred thirty".