21690200382 has 32 divisors (see below), whose sum is σ = 43702872192. Its totient is φ = 7176436704.

The previous prime is 21690200381. The next prime is 21690200383. The reversal of 21690200382 is 28300209612.

It is a happy number.

21690200382 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (21690200381) and next prime (21690200383).

It is a super-2 number, since 2×21690200382² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21690200381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 765553 + ... + 793379.

It is an arithmetic number, because the mean of its divisors is an integer number (1365714756).

Almost surely, 2^21690200382 is an apocalyptic number.

21690200382 is an abundant number, since it is smaller than the sum of its proper divisors (22012671810).

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

21690200382 is a wasteful number, since it uses less digits than its factorization.

21690200382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28792.

The product of its (nonzero) digits is 10368, while the sum is 33.

Adding to 21690200382 its reverse (28300209612), we get a palindrome (49990409994).

The spelling of 21690200382 in words is "twenty-one billion, six hundred ninety million, two hundred thousand, three hundred eighty-two".