21140431022 has 8 divisors (see below), whose sum is σ = 33575978736. Its totient is φ = 9948438112.

The previous prime is 21140430977. The next prime is 21140431027. The reversal of 21140431022 is 22013404112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21140430985 and 21140431003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140431027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310888658 + ... + 310888725.

It is an arithmetic number, because the mean of its divisors is an integer number (4196997342).

Almost surely, 2^21140431022 is an apocalyptic number.

21140431022 is a deficient number, since it is larger than the sum of its proper divisors (12435547714).

21140431022 is a wasteful number, since it uses less digits than its factorization.

21140431022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621777402.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21140431022 its reverse (22013404112), we get a palindrome (43153835134).

The spelling of 21140431022 in words is "twenty-one billion, one hundred forty million, four hundred thirty-one thousand, twenty-two".