21431430310 has 8 divisors (see below), whose sum is σ = 38576574576. Its totient is φ = 8572572120.

The previous prime is 21431430299. The next prime is 21431430329. The reversal of 21431430310 is 1303413412.

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

It is a super-2 number, since 2×21431430310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1071571506 + ... + 1071571525.

It is an arithmetic number, because the mean of its divisors is an integer number (4822071822).

Almost surely, 2^21431430310 is an apocalyptic number.

21431430310 is a deficient number, since it is larger than the sum of its proper divisors (17145144266).

21431430310 is a wasteful number, since it uses less digits than its factorization.

21431430310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2143143038.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21431430310 its reverse (1303413412), we get a palindrome (22734843722).

The spelling of 21431430310 in words is "twenty-one billion, four hundred thirty-one million, four hundred thirty thousand, three hundred ten".