213921989596 has 24 divisors (see below), whose sum is σ = 450362084480. Its totient is φ = 86855544432.

The previous prime is 213921989579. The next prime is 213921989609. The reversal of 213921989596 is 695989129312.

It is a super-2 number, since 2×213921989596² (a number of 23 digits) contains 22 as substring.

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, 201053970 + ... + 201055033.

Almost surely, 2^213921989596 is an apocalyptic number.

It is an amenable number.

213921989596 is an abundant number, since it is smaller than the sum of its proper divisors (236440094884).

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

213921989596 is a wasteful number, since it uses less digits than its factorization.

213921989596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402109033 (or 402109031 counting only the distinct ones).

The product of its digits is 18895680, while the sum is 64.

The spelling of 213921989596 in words is "two hundred thirteen billion, nine hundred twenty-one million, nine hundred eighty-nine thousand, five hundred ninety-six".