20899527312 has 80 divisors (see below), whose sum is σ = 55047548160. Its totient is φ = 6830294016.

The previous prime is 20899527251. The next prime is 20899527373. The reversal of 20899527312 is 21372599802.

It is an interprime number because it is at equal distance from previous prime (20899527251) and next prime (20899527373).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7037764 + ... + 7040732.

It is an arithmetic number, because the mean of its divisors is an integer number (688094352).

Almost surely, 2^20899527312 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 20899527312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27523774080).

20899527312 is an abundant number, since it is smaller than the sum of its proper divisors (34148020848).

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

20899527312 is a wasteful number, since it uses less digits than its factorization.

20899527312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5800 (or 5794 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 20899527312 in words is "twenty billion, eight hundred ninety-nine million, five hundred twenty-seven thousand, three hundred twelve".