21213590496 has 192 divisors, whose sum is σ = 64316851200. Its totient is φ = 5997035520.

The previous prime is 21213590491. The next prime is 21213590513. The reversal of 21213590496 is 69409531212.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213590491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47246080 + ... + 47246528.

It is an arithmetic number, because the mean of its divisors is an integer number (334983600).

Almost surely, 2^21213590496 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 21213590496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32158425600).

21213590496 is an abundant number, since it is smaller than the sum of its proper divisors (43103260704).

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

21213590496 is a wasteful number, since it uses less digits than its factorization.

21213590496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057 (or 1049 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 21213590496 in words is "twenty-one billion, two hundred thirteen million, five hundred ninety thousand, four hundred ninety-six".