20099465568 has 576 divisors, whose sum is σ = 75191276160. Its totient is φ = 4942135296.

The previous prime is 20099465557. The next prime is 20099465569. The reversal of 20099465568 is 86556499002.

It is a happy number.

It is a super-2 number, since 2×20099465568² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20099465569) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 87770478 + ... + 87770706.

It is an arithmetic number, because the mean of its divisors is an integer number (130540410).

Almost surely, 2^20099465568 is an apocalyptic number.

20099465568 is a gapful number since it is divisible by the number (28) 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 20099465568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37595638080).

20099465568 is an abundant number, since it is smaller than the sum of its proper divisors (55091810592).

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

20099465568 is a wasteful number, since it uses less digits than its factorization.

20099465568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 20099465568 in words is "twenty billion, ninety-nine million, four hundred sixty-five thousand, five hundred sixty-eight".