21926086 has 16 divisors (see below), whose sum is σ = 40479264. Its totient is φ = 8673984.

The previous prime is 21926077. The next prime is 21926123. The reversal of 21926086 is 68062912.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 60055 + ... + 60418.

It is an arithmetic number, because the mean of its divisors is an integer number (2529954).

Almost surely, 2^21926086 is an apocalyptic number.

21926086 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21926086 is a deficient number, since it is larger than the sum of its proper divisors (18553178).

21926086 is a wasteful number, since it uses less digits than its factorization.

21926086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120495.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 21926086 is about 4682.5298717680. The cubic root of 21926086 is about 279.8897780454.

Adding to 21926086 its reverse (68062912), we get a palindrome (89988998).

The spelling of 21926086 in words is "twenty-one million, nine hundred twenty-six thousand, eighty-six".