20499552000 has 864 divisors, whose sum is σ = 80583310080. Its totient is φ = 4984012800.

The previous prime is 20499551977. The next prime is 20499552011. The reversal of 20499552000 is 25599402.

It is a happy number.

20499552000 is a `hidden beast` number, since 2 + 0 + 49 + 95 + 520 + 0 + 0 = 666.

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, 259487961 + ... + 259488039.

It is an arithmetic number, because the mean of its divisors is an integer number (93267720).

Almost surely, 2^20499552000 is an apocalyptic number.

20499552000 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 20499552000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40291655040).

20499552000 is an abundant number, since it is smaller than the sum of its proper divisors (60083758080).

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

20499552000 is a wasteful number, since it uses less digits than its factorization.

20499552000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 20499552000 in words is "twenty billion, four hundred ninety-nine million, five hundred fifty-two thousand".