21626674 has 16 divisors (see below), whose sum is σ = 34876800. Its totient is φ = 10025424.

The previous prime is 21626653. The next prime is 21626719. The reversal of 21626674 is 47662612.

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, 4269 + ... + 7840.

It is an arithmetic number, because the mean of its divisors is an integer number (2179800).

Almost surely, 2^21626674 is an apocalyptic number.

21626674 is a deficient number, since it is larger than the sum of its proper divisors (13250126).

21626674 is a wasteful number, since it uses less digits than its factorization.

21626674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12177.

The product of its digits is 24192, while the sum is 34.

The square root of 21626674 is about 4650.4487955465. The cubic root of 21626674 is about 278.6099215084.

It can be divided in two parts, 2162 and 6674, that added together give a square (8836 = 94²).

The spelling of 21626674 in words is "twenty-one million, six hundred twenty-six thousand, six hundred seventy-four".