21937834 has 8 divisors (see below), whose sum is σ = 32940288. Its totient is φ = 10957740.

The previous prime is 21937819. The next prime is 21937841. The reversal of 21937834 is 43873912.

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

It is a super-2 number, since 2×21937834² = 962537121223112, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21937793 and 21937802.

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, 2872 + ... + 7219.

It is an arithmetic number, because the mean of its divisors is an integer number (4117536).

Almost surely, 2^21937834 is an apocalyptic number.

21937834 is a deficient number, since it is larger than the sum of its proper divisors (11002454).

21937834 is a wasteful number, since it uses less digits than its factorization.

21937834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11180.

The product of its digits is 36288, while the sum is 37.

The square root of 21937834 is about 4683.7841538653. The cubic root of 21937834 is about 279.9397574478.

The spelling of 21937834 in words is "twenty-one million, nine hundred thirty-seven thousand, eight hundred thirty-four".