21934124 has 6 divisors (see below), whose sum is σ = 38384724. Its totient is φ = 10967060.

The previous prime is 21934093. The next prime is 21934127. The reversal of 21934124 is 42143912.

It is a super-2 number, since 2×21934124² = 962211591294752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21934093 and 21934102.

It is not an unprimeable number, because it can be changed into a prime (21934127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2741762 + ... + 2741769.

It is an arithmetic number, because the mean of its divisors is an integer number (6397454).

Almost surely, 2^21934124 is an apocalyptic number.

It is an amenable number.

21934124 is a deficient number, since it is larger than the sum of its proper divisors (16450600).

21934124 is a wasteful number, since it uses less digits than its factorization.

21934124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5483535 (or 5483533 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 21934124 is about 4683.3880898341. The cubic root of 21934124 is about 279.9239759589.

It can be divided in two parts, 219 and 34124, that added together give a palindrome (34343).

The spelling of 21934124 in words is "twenty-one million, nine hundred thirty-four thousand, one hundred twenty-four".