21695936 has 14 divisors (see below), whose sum is σ = 43053000. Its totient is φ = 10847936.

The previous prime is 21695917. The next prime is 21695941. The reversal of 21695936 is 63959612.

It is a junction number, because it is equal to n+sod(n) for n = 21695893 and 21695902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169436 + ... + 169563.

Almost surely, 2^21695936 is an apocalyptic number.

It is an amenable number.

21695936 is a deficient number, since it is larger than the sum of its proper divisors (21357064).

21695936 is an equidigital number, since it uses as much as digits as its factorization.

21695936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339011 (or 339001 counting only the distinct ones).

The product of its digits is 87480, while the sum is 41.

The square root of 21695936 is about 4657.8896509042. The cubic root of 21695936 is about 278.9070317122.

The spelling of 21695936 in words is "twenty-one million, six hundred ninety-five thousand, nine hundred thirty-six".