21015233410 has 16 divisors (see below), whose sum is σ = 37905103296. Its totient is φ = 8388830448.

The previous prime is 21015233401. The next prime is 21015233441. The reversal of 21015233410 is 1433251012.

It is a happy 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, 2152752 + ... + 2162491.

It is an arithmetic number, because the mean of its divisors is an integer number (2369068956).

Almost surely, 2^21015233410 is an apocalyptic number.

21015233410 is a deficient number, since it is larger than the sum of its proper divisors (16889869886).

21015233410 is a wasteful number, since it uses less digits than its factorization.

21015233410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4315737.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 21015233410 its reverse (1433251012), we get a palindrome (22448484422).

The spelling of 21015233410 in words is "twenty-one billion, fifteen million, two hundred thirty-three thousand, four hundred ten".