21769398000 has 800 divisors, whose sum is σ = 91377960960. Its totient is φ = 4912876800.

The previous prime is 21769397971. The next prime is 21769398011. The reversal of 21769398000 is 89396712.

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 159 ways as a sum of consecutive naturals, for example, 275561961 + ... + 275562039.

Almost surely, 2^21769398000 is an apocalyptic number.

21769398000 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 21769398000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45688980480).

21769398000 is an abundant number, since it is smaller than the sum of its proper divisors (69608562960).

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

21769398000 is an frugal number, since it uses more digits than its factorization.

21769398000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 21769398000 in words is "twenty-one billion, seven hundred sixty-nine million, three hundred ninety-eight thousand".