21139622 has 16 divisors (see below), whose sum is σ = 37815552. Its totient is φ = 8665800.

The previous prime is 21139621. The next prime is 21139627. The reversal of 21139622 is 22693112.

It is a junction number, because it is equal to n+sod(n) for n = 21139591 and 21139600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21139621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32504 + ... + 33147.

It is an arithmetic number, because the mean of its divisors is an integer number (2363472).

Almost surely, 2^21139622 is an apocalyptic number.

21139622 is a deficient number, since it is larger than the sum of its proper divisors (16675930).

21139622 is a wasteful number, since it uses less digits than its factorization.

21139622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65683.

The product of its digits is 1296, while the sum is 26.

The square root of 21139622 is about 4597.7844664577. The cubic root of 21139622 is about 276.5025064437.

The spelling of 21139622 in words is "twenty-one million, one hundred thirty-nine thousand, six hundred twenty-two".