20499156000 has 480 divisors, whose sum is σ = 75917761920. Its totient is φ = 5417280000.

The previous prime is 20499155981. The next prime is 20499156043. The reversal of 20499156000 is 65199402.

20499156000 is a `hidden beast` number, since 2 + 0 + 4 + 9 + 91 + 560 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 48923791 + ... + 48924209.

It is an arithmetic number, because the mean of its divisors is an integer number (158162004).

Almost surely, 2^20499156000 is an apocalyptic number.

20499156000 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 20499156000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37958880960).

20499156000 is an abundant number, since it is smaller than the sum of its proper divisors (55418605920).

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

20499156000 is a wasteful number, since it uses less digits than its factorization.

20499156000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607 (or 580 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 20499156000 in words is "twenty billion, four hundred ninety-nine million, one hundred fifty-six thousand".