21893401062 has 80 divisors (see below), whose sum is σ = 52888577280. Its totient is φ = 6729101568.

The previous prime is 21893401009. The next prime is 21893401139. The reversal of 21893401062 is 26010439812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2119803 + ... + 2130105.

It is an arithmetic number, because the mean of its divisors is an integer number (661107216).

Almost surely, 2^21893401062 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21893401062, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26444288640).

21893401062 is an abundant number, since it is smaller than the sum of its proper divisors (30995176218).

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

21893401062 is a wasteful number, since it uses less digits than its factorization.

21893401062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11339 (or 11330 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 21893401062 in words is "twenty-one billion, eight hundred ninety-three million, four hundred one thousand, sixty-two".