21431321414 has 16 divisors (see below), whose sum is σ = 32880724416. Its totient is φ = 10471771200.

The previous prime is 21431321399. The next prime is 21431321441. The reversal of 21431321414 is 41412313412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110327 + ... + 234594.

It is an arithmetic number, because the mean of its divisors is an integer number (2055045276).

Almost surely, 2^21431321414 is an apocalyptic number.

21431321414 is a deficient number, since it is larger than the sum of its proper divisors (11449403002).

21431321414 is a wasteful number, since it uses less digits than its factorization.

21431321414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345631.

The product of its digits is 2304, while the sum is 26.

Adding to 21431321414 its reverse (41412313412), we get a palindrome (62843634826).

The spelling of 21431321414 in words is "twenty-one billion, four hundred thirty-one million, three hundred twenty-one thousand, four hundred fourteen".