21083190 has 16 divisors (see below), whose sum is σ = 50599728. Its totient is φ = 5622176.

The previous prime is 21083189. The next prime is 21083191. The reversal of 21083190 is 9138012.

It is an interprime number because it is at equal distance from previous prime (21083189) and next prime (21083191).

It is a super-2 number, since 2×21083190² = 889001801152200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21083190.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21083191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351357 + ... + 351416.

It is an arithmetic number, because the mean of its divisors is an integer number (3162483).

Almost surely, 2^21083190 is an apocalyptic number.

21083190 is an abundant number, since it is smaller than the sum of its proper divisors (29516538).

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

21083190 is a wasteful number, since it uses less digits than its factorization.

21083190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702783.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 21083190 is about 4591.6434966143. The cubic root of 21083190 is about 276.2562470008.

The spelling of 21083190 in words is "twenty-one million, eighty-three thousand, one hundred ninety".