21413965194 has 64 divisors (see below), whose sum is σ = 48862517760. Its totient is φ = 6947424000.

The previous prime is 21413965159. The next prime is 21413965211. The reversal of 21413965194 is 49156931412.

21413965194 is a `hidden beast` number, since 2 + 1 + 41 + 3 + 96 + 519 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 943014 + ... + 965454.

It is an arithmetic number, because the mean of its divisors is an integer number (763476840).

Almost surely, 2^21413965194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21413965194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24431258880).

21413965194 is an abundant number, since it is smaller than the sum of its proper divisors (27448552566).

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

21413965194 is a wasteful number, since it uses less digits than its factorization.

21413965194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22924 (or 22918 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The spelling of 21413965194 in words is "twenty-one billion, four hundred thirteen million, nine hundred sixty-five thousand, one hundred ninety-four".