20918898000 has 1920 divisors, whose sum is σ = 104097337344. Its totient is φ = 3919104000.

The previous prime is 20918897963. The next prime is 20918898023. The reversal of 20918898000 is 89881902.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 486485979 + ... + 486486021.

Almost surely, 2^20918898000 is an apocalyptic number.

20918898000 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 20918898000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52048668672).

20918898000 is an abundant number, since it is smaller than the sum of its proper divisors (83178439344).

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

20918898000 is a wasteful number, since it uses less digits than its factorization.

20918898000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The spelling of 20918898000 in words is "twenty billion, nine hundred eighteen million, eight hundred ninety-eight thousand".