21431651230 has 64 divisors (see below), whose sum is σ = 42678187200. Its totient is φ = 7683793920.

The previous prime is 21431651209. The next prime is 21431651233. The reversal of 21431651230 is 3215613412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21431651233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3648736 + ... + 3654604.

It is an arithmetic number, because the mean of its divisors is an integer number (666846675).

Almost surely, 2^21431651230 is an apocalyptic number.

21431651230 is a deficient number, since it is larger than the sum of its proper divisors (21246535970).

21431651230 is a wasteful number, since it uses less digits than its factorization.

21431651230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6349.

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

The spelling of 21431651230 in words is "twenty-one billion, four hundred thirty-one million, six hundred fifty-one thousand, two hundred thirty".