20617529088 has 144 divisors (see below), whose sum is σ = 59379802496. Its totient is φ = 6313144320.

The previous prime is 20617529069. The next prime is 20617529089. The reversal of 20617529088 is 88092571602.

It is a super-2 number, since 2×20617529088² (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 (20617529089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2101731 + ... + 2111517.

Almost surely, 2^20617529088 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 20617529088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29689901248).

20617529088 is an abundant number, since it is smaller than the sum of its proper divisors (38762273408).

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

20617529088 is a wasteful number, since it uses less digits than its factorization.

20617529088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10030 (or 10016 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 20617529088 in words is "twenty billion, six hundred seventeen million, five hundred twenty-nine thousand, eighty-eight".