21431022430 has 8 divisors (see below), whose sum is σ = 38575840392. Its totient is φ = 8572408968.

The previous prime is 21431022419. The next prime is 21431022439. The reversal of 21431022430 is 3422013412.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21431022439) 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, 1071551112 + ... + 1071551131.

It is an arithmetic number, because the mean of its divisors is an integer number (4821980049).

Almost surely, 2^21431022430 is an apocalyptic number.

21431022430 is a deficient number, since it is larger than the sum of its proper divisors (17144817962).

21431022430 is a wasteful number, since it uses less digits than its factorization.

21431022430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2143102250.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21431022430 its reverse (3422013412), we get a palindrome (24853035842).

The spelling of 21431022430 in words is "twenty-one billion, four hundred thirty-one million, twenty-two thousand, four hundred thirty".