20613857088 has 224 divisors, whose sum is σ = 63414005760. Its totient is φ = 5847255040.

The previous prime is 20613857087. The next prime is 20613857119. The reversal of 20613857088 is 88075831602.

It is a super-2 number, since 2×20613857088² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20613857081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2278558 + ... + 2287586.

It is an arithmetic number, because the mean of its divisors is an integer number (283098240).

Almost surely, 2^20613857088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20613857088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31707002880).

20613857088 is an abundant number, since it is smaller than the sum of its proper divisors (42800148672).

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

20613857088 is a wasteful number, since it uses less digits than its factorization.

20613857088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9125 (or 9115 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 20613857088 in words is "twenty billion, six hundred thirteen million, eight hundred fifty-seven thousand, eighty-eight".