190021331808 has 240 divisors, whose sum is σ = 696745615104. Its totient is φ = 49356138240.

The previous prime is 190021331771. The next prime is 190021331821. The reversal of 190021331808 is 808133120091.

190021331808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×190021331808² (a number of 23 digits) contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 276460 + ... + 675627.

Almost surely, 2^190021331808 is an apocalyptic number.

190021331808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

190021331808 is an abundant number, since it is smaller than the sum of its proper divisors (506724283296).

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

190021331808 is a wasteful number, since it uses less digits than its factorization.

190021331808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952127 (or 952110 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

Adding to 190021331808 its reverse (808133120091), we get a palindrome (998154451899).

The spelling of 190021331808 in words is "one hundred ninety billion, twenty-one million, three hundred thirty-one thousand, eight hundred eight".