21969738000 has 1440 divisors, whose sum is σ = 100822475520. Its totient is φ = 4550515200.

The previous prime is 21969737983. The next prime is 21969738053. The reversal of 21969738000 is 83796912.

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

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 955205989 + ... + 955206011.

It is an arithmetic number, because the mean of its divisors is an integer number (70015608).

Almost surely, 2^21969738000 is an apocalyptic number.

21969738000 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 21969738000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50411237760).

21969738000 is an abundant number, since it is smaller than the sum of its proper divisors (78852737520).

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

21969738000 is a wasteful number, since it uses less digits than its factorization.

21969738000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 59 counting only the distinct ones).

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

The spelling of 21969738000 in words is "twenty-one billion, nine hundred sixty-nine million, seven hundred thirty-eight thousand".