20422651500 has 240 divisors, whose sum is σ = 68053265280. Its totient is φ = 5329670400.

The previous prime is 20422651499. The next prime is 20422651567. The reversal of 20422651500 is 515622402.

20422651500 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 2 + 651 + 5 + 0 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1898136 + ... + 1908864.

It is an arithmetic number, because the mean of its divisors is an integer number (283555272).

Almost surely, 2^20422651500 is an apocalyptic number.

20422651500 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 20422651500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34026632640).

20422651500 is an abundant number, since it is smaller than the sum of its proper divisors (47630613780).

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

20422651500 is a wasteful number, since it uses less digits than its factorization.

20422651500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10807 (or 10786 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 20422651500 in words is "twenty billion, four hundred twenty-two million, six hundred fifty-one thousand, five hundred".