21923934 has 8 divisors (see below), whose sum is σ = 43847880. Its totient is φ = 7307976.

The previous prime is 21923917. The next prime is 21923947. The reversal of 21923934 is 43932912.

It is a sphenic number, since it is the product of 3 distinct primes.

21923934 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21923895 and 21923904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1826989 + ... + 1827000.

It is an arithmetic number, because the mean of its divisors is an integer number (5480985).

Almost surely, 2^21923934 is an apocalyptic number.

21923934 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21923934 is a wasteful number, since it uses less digits than its factorization.

21923934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3653994.

The product of its digits is 11664, while the sum is 33.

The square root of 21923934 is about 4682.3000758174. The cubic root of 21923934 is about 279.8806208782.

The spelling of 21923934 in words is "twenty-one million, nine hundred twenty-three thousand, nine hundred thirty-four".