21934486 has 8 divisors (see below), whose sum is σ = 37602000. Its totient is φ = 9400488.

The previous prime is 21934483. The next prime is 21934499. The reversal of 21934486 is 68443912.

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

It is a super-2 number, since 2×21934486² = 962243352168392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21934483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783361 + ... + 783388.

It is an arithmetic number, because the mean of its divisors is an integer number (4700250).

Almost surely, 2^21934486 is an apocalyptic number.

21934486 is a deficient number, since it is larger than the sum of its proper divisors (15667514).

21934486 is a wasteful number, since it uses less digits than its factorization.

21934486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566758.

The product of its digits is 41472, while the sum is 37.

The square root of 21934486 is about 4683.4267369096. The cubic root of 21934486 is about 279.9255159022.

The spelling of 21934486 in words is "twenty-one million, nine hundred thirty-four thousand, four hundred eighty-six".