21412604416 has 160 divisors (see below), whose sum is σ = 50218071552. Its totient is φ = 8930918400.

The previous prime is 21412604413. The next prime is 21412604449. The reversal of 21412604416 is 61440621412.

It is a super-2 number, since 2×21412604416² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21412604413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53397816 + ... + 53398216.

Almost surely, 2^21412604416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21412604416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25109035776).

21412604416 is an abundant number, since it is smaller than the sum of its proper divisors (28805467136).

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

21412604416 is an equidigital number, since it uses as much as digits as its factorization.

21412604416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 21412604416 in words is "twenty-one billion, four hundred twelve million, six hundred four thousand, four hundred sixteen".