21578892296 has 64 divisors (see below), whose sum is σ = 45000748800. Its totient is φ = 9637867008.

The previous prime is 21578892281. The next prime is 21578892311. The reversal of 21578892296 is 69229887512.

It is an interprime number because it is at equal distance from previous prime (21578892281) and next prime (21578892311).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410231 + ... + 459833.

It is an arithmetic number, because the mean of its divisors is an integer number (703136700).

Almost surely, 2^21578892296 is an apocalyptic number.

21578892296 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21578892296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22500374400).

21578892296 is an abundant number, since it is smaller than the sum of its proper divisors (23421856504).

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

21578892296 is a wasteful number, since it uses less digits than its factorization.

21578892296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49758 (or 49754 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 59.

The spelling of 21578892296 in words is "twenty-one billion, five hundred seventy-eight million, eight hundred ninety-two thousand, two hundred ninety-six".