21675950 has 24 divisors (see below), whose sum is σ = 40778640. Its totient is φ = 8571200.

The previous prime is 21675949. The next prime is 21676007. The reversal of 21675950 is 5957612.

It is a self number, because there is not a number n which added to its sum of digits gives 21675950.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2015 + ... + 6885.

It is an arithmetic number, because the mean of its divisors is an integer number (1699110).

Almost surely, 2^21675950 is an apocalyptic number.

21675950 is a deficient number, since it is larger than the sum of its proper divisors (19102690).

21675950 is a wasteful number, since it uses less digits than its factorization.

21675950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4972 (or 4967 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 21675950 is about 4655.7437644269. The cubic root of 21675950 is about 278.8213636183.

The spelling of 21675950 in words is "twenty-one million, six hundred seventy-five thousand, nine hundred fifty".