20988088902 has 128 divisors (see below), whose sum is σ = 55006732800. Its totient is φ = 5862326400.

The previous prime is 20988088897. The next prime is 20988088907.

20988088902 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (20988088897) and next prime (20988088907).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20988088907) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 392452 + ... + 442712.

It is an arithmetic number, because the mean of its divisors is an integer number (429740100).

Almost surely, 2^20988088902 is an apocalyptic number.

20988088902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20988088902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27503366400).

20988088902 is an abundant number, since it is smaller than the sum of its proper divisors (34018643898).

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

20988088902 is a wasteful number, since it uses less digits than its factorization.

20988088902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50339 (or 50333 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The spelling of 20988088902 in words is "twenty billion, nine hundred eighty-eight million, eighty-eight thousand, nine hundred two".