20321199360 has 864 divisors, whose sum is σ = 90608394240. Its totient is φ = 4080844800.

The previous prime is 20321199359. The next prime is 20321199401. The reversal of 20321199360 is 6399112302.

It is a happy number.

20321199360 is a `hidden beast` number, since 203 + 2 + 1 + 1 + 99 + 360 = 666.

It is a super-2 number, since 2×20321199360² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 27497871 + ... + 27498609.

Almost surely, 2^20321199360 is an apocalyptic number.

20321199360 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 20321199360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45304197120).

20321199360 is an abundant number, since it is smaller than the sum of its proper divisors (70287194880).

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

20321199360 is a wasteful number, since it uses less digits than its factorization.

20321199360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The spelling of 20321199360 in words is "twenty billion, three hundred twenty-one million, one hundred ninety-nine thousand, three hundred sixty".