21363934 has 16 divisors (see below), whose sum is σ = 34020000. Its totient is φ = 10027264.

The previous prime is 21363907. The next prime is 21363949. The reversal of 21363934 is 43936312.

It is a junction number, because it is equal to n+sod(n) for n = 21363896 and 21363905.

It is a congruent number.

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, 19842 + ... + 20890.

It is an arithmetic number, because the mean of its divisors is an integer number (2126250).

Almost surely, 2^21363934 is an apocalyptic number.

21363934 is a deficient number, since it is larger than the sum of its proper divisors (12656066).

21363934 is a wasteful number, since it uses less digits than its factorization.

21363934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667.

The product of its digits is 11664, while the sum is 31.

The square root of 21363934 is about 4622.1135857960. The cubic root of 21363934 is about 277.4770546188.

The spelling of 21363934 in words is "twenty-one million, three hundred sixty-three thousand, nine hundred thirty-four".