21115002030 has 16 divisors (see below), whose sum is σ = 50676004944. Its totient is φ = 5630667200.

The previous prime is 21115002023. The next prime is 21115002049. The reversal of 21115002030 is 3020051112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351916671 + ... + 351916730.

It is an arithmetic number, because the mean of its divisors is an integer number (3167250309).

Almost surely, 2^21115002030 is an apocalyptic number.

21115002030 is an abundant number, since it is smaller than the sum of its proper divisors (29561002914).

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

21115002030 is a wasteful number, since it uses less digits than its factorization.

21115002030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703833411.

The product of its (nonzero) digits is 60, while the sum is 15.

Adding to 21115002030 its reverse (3020051112), we get a palindrome (24135053142).

The spelling of 21115002030 in words is "twenty-one billion, one hundred fifteen million, two thousand, thirty".