21899340000 has 360 divisors, whose sum is σ = 78752353680. Its totient is φ = 5769984000.

The previous prime is 21899339993. The next prime is 21899340079. The reversal of 21899340000 is 4399812.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 16019317 + ... + 16020683.

It is an arithmetic number, because the mean of its divisors is an integer number (218756538).

Almost surely, 2^21899340000 is an apocalyptic number.

21899340000 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 21899340000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39376176840).

21899340000 is an abundant number, since it is smaller than the sum of its proper divisors (56853013680).

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

21899340000 is a wasteful number, since it uses less digits than its factorization.

21899340000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492 (or 1466 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 21899340000 in words is "twenty-one billion, eight hundred ninety-nine million, three hundred forty thousand".