21411432318 has 16 divisors (see below), whose sum is σ = 42908688000. Its totient is φ = 7122840216.

The previous prime is 21411432281. The next prime is 21411432319. The reversal of 21411432318 is 81323411412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411432319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3572730 + ... + 3578717.

It is an arithmetic number, because the mean of its divisors is an integer number (2681793000).

Almost surely, 2^21411432318 is an apocalyptic number.

21411432318 is an abundant number, since it is smaller than the sum of its proper divisors (21497255682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21411432318 is a wasteful number, since it uses less digits than its factorization.

21411432318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7151951.

The product of its digits is 4608, while the sum is 30.

The spelling of 21411432318 in words is "twenty-one billion, four hundred eleven million, four hundred thirty-two thousand, three hundred eighteen".