21996202536 has 384 divisors, whose sum is σ = 80385177600. Its totient is φ = 5464039680.

The previous prime is 21996202447. The next prime is 21996202541. The reversal of 21996202536 is 63520269912.

21996202536 is a `hidden beast` number, since 2 + 1 + 9 + 96 + 20 + 2 + 536 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21996202491 and 21996202500.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3439630 + ... + 3446018.

It is an arithmetic number, because the mean of its divisors is an integer number (209336400).

Almost surely, 2^21996202536 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 21996202536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40192588800).

21996202536 is an abundant number, since it is smaller than the sum of its proper divisors (58388975064).

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

21996202536 is a wasteful number, since it uses less digits than its factorization.

21996202536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6451 (or 6435 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 21996202536 in words is "twenty-one billion, nine hundred ninety-six million, two hundred two thousand, five hundred thirty-six".