21626086 has 16 divisors (see below), whose sum is σ = 33310368. Its totient is φ = 10526400.

The previous prime is 21626051. The next prime is 21626131. The reversal of 21626086 is 68062612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11706 + ... + 13426.

It is an arithmetic number, because the mean of its divisors is an integer number (2081898).

Almost surely, 2^21626086 is an apocalyptic number.

21626086 is a deficient number, since it is larger than the sum of its proper divisors (11684282).

21626086 is a wasteful number, since it uses less digits than its factorization.

21626086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 21626086 is about 4650.3855754120. The cubic root of 21626086 is about 278.6073964766.

Adding to 21626086 its reverse (68062612), we get a palindrome (89688698).

The spelling of 21626086 in words is "twenty-one million, six hundred twenty-six thousand, eighty-six".