21234153016 has 64 divisors (see below), whose sum is σ = 41130270720. Its totient is φ = 10271345280.

The previous prime is 21234153007. The next prime is 21234153023. The reversal of 21234153016 is 61035143212.

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 15 ways as a sum of consecutive naturals, for example, 19250721 + ... + 19251823.

It is an arithmetic number, because the mean of its divisors is an integer number (642660480).

Almost surely, 2^21234153016 is an apocalyptic number.

It is an amenable number.

21234153016 is a deficient number, since it is larger than the sum of its proper divisors (19896117704).

21234153016 is a wasteful number, since it uses less digits than its factorization.

21234153016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636 (or 1632 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 21234153016 its reverse (61035143212), we get a palindrome (82269296228).

The spelling of 21234153016 in words is "twenty-one billion, two hundred thirty-four million, one hundred fifty-three thousand, sixteen".