21833338383990 has 512 divisors, whose sum is σ = 69578204774400. Its totient is φ = 4767989391360.

The previous prime is 21833338383947. The next prime is 21833338384003. The reversal of 21833338383990 is 9938383333812.

21833338383990 is a `hidden beast` number, since 2 + 183 + 3 + 3 + 38 + 38 + 399 + 0 = 666.

It is a super-2 number, since 2×21833338383990² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 2336861259 + ... + 2336870601.

It is an arithmetic number, because the mean of its divisors is an integer number (135894931200).

Almost surely, 2^{21833338383990} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21833338383990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34789102387200).

21833338383990 is an abundant number, since it is smaller than the sum of its proper divisors (47744866390410).

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

21833338383990 is a wasteful number, since it uses less digits than its factorization.

21833338383990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10029 (or 10023 counting only the distinct ones).

The product of its (nonzero) digits is 60466176, while the sum is 63.

The spelling of 21833338383990 in words is "twenty-one trillion, eight hundred thirty-three billion, three hundred thirty-eight million, three hundred eighty-three thousand, nine hundred ninety".