21083626 has 4 divisors (see below), whose sum is σ = 31625442. Its totient is φ = 10541812.

The previous prime is 21083611. The next prime is 21083633. The reversal of 21083626 is 62638012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18190225 + 2893401 = 4265^2 + 1701^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21083594 and 21083603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5270905 + ... + 5270908.

Almost surely, 2^21083626 is an apocalyptic number.

21083626 is a deficient number, since it is larger than the sum of its proper divisors (10541816).

21083626 is a wasteful number, since it uses less digits than its factorization.

21083626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10541815.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 21083626 is about 4591.6909739224. The cubic root of 21083626 is about 276.2581513125.

The spelling of 21083626 in words is "twenty-one million, eighty-three thousand, six hundred twenty-six".