21695950 has 24 divisors (see below), whose sum is σ = 40477320. Its totient is φ = 8652000.

The previous prime is 21695941. The next prime is 21695953. The reversal of 21695950 is 5959612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21695953) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 30600 + ... + 31300.

It is an arithmetic number, because the mean of its divisors is an integer number (1686555).

Almost surely, 2^21695950 is an apocalyptic number.

21695950 is a deficient number, since it is larger than the sum of its proper divisors (18781370).

21695950 is a wasteful number, since it uses less digits than its factorization.

21695950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332 (or 1327 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 21695950 is about 4657.8911537304. The cubic root of 21695950 is about 278.9070917034.

The spelling of 21695950 in words is "twenty-one million, six hundred ninety-five thousand, nine hundred fifty".