21635050560 has 224 divisors, whose sum is σ = 71528171904. Its totient is φ = 5535744000.

The previous prime is 21635050543. The next prime is 21635050609. The reversal of 21635050560 is 6505053612.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2396455 + ... + 2405465.

It is an arithmetic number, because the mean of its divisors is an integer number (319322196).

Almost surely, 2^21635050560 is an apocalyptic number.

21635050560 is a gapful number since it is divisible by the number (20) 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 21635050560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35764085952).

21635050560 is an abundant number, since it is smaller than the sum of its proper divisors (49893121344).

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

21635050560 is a wasteful number, since it uses less digits than its factorization.

21635050560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9133 (or 9123 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The spelling of 21635050560 in words is "twenty-one billion, six hundred thirty-five million, fifty thousand, five hundred sixty".