21626950 has 12 divisors (see below), whose sum is σ = 40226220. Its totient is φ = 8650760.

The previous prime is 21626887. The next prime is 21626951. The reversal of 21626950 is 5962612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21626951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216220 + ... + 216319.

It is an arithmetic number, because the mean of its divisors is an integer number (3352185).

Almost surely, 2^21626950 is an apocalyptic number.

21626950 is a deficient number, since it is larger than the sum of its proper divisors (18599270).

21626950 is a wasteful number, since it uses less digits than its factorization.

21626950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432551 (or 432546 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 21626950 is about 4650.4784700071. The cubic root of 21626950 is about 278.6111067116.

The spelling of 21626950 in words is "twenty-one million, six hundred twenty-six thousand, nine hundred fifty".