21113431414 has 8 divisors (see below), whose sum is σ = 32142836088. Its totient is φ = 10399152720.

The previous prime is 21113431387. The next prime is 21113431421. The reversal of 21113431414 is 41413431112.

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

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, 78781327 + ... + 78781594.

It is an arithmetic number, because the mean of its divisors is an integer number (4017854511).

Almost surely, 2^21113431414 is an apocalyptic number.

21113431414 is a deficient number, since it is larger than the sum of its proper divisors (11029404674).

21113431414 is a wasteful number, since it uses less digits than its factorization.

21113431414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157562990.

The product of its digits is 1152, while the sum is 25.

Adding to 21113431414 its reverse (41413431112), we get a palindrome (62526862526).

The spelling of 21113431414 in words is "twenty-one billion, one hundred thirteen million, four hundred thirty-one thousand, four hundred fourteen".