20554722000 has 400 divisors, whose sum is σ = 74761871184. Its totient is φ = 5443200000.

The previous prime is 20554721989. The next prime is 20554722029. The reversal of 20554722000 is 22745502.

20554722000 is a `hidden beast` number, since 20 + 554 + 72 + 20 + 0 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 9405896256 + 11148825744 = 96984^2 + 105588^2 .

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 29321650 + ... + 29322350.

Almost surely, 2^20554722000 is an apocalyptic number.

20554722000 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 20554722000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37380935592).

20554722000 is an abundant number, since it is smaller than the sum of its proper divisors (54207149184).

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

20554722000 is a wasteful number, since it uses less digits than its factorization.

20554722000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The spelling of 20554722000 in words is "twenty billion, five hundred fifty-four million, seven hundred twenty-two thousand".