21923342 has 16 divisors (see below), whose sum is σ = 37778400. Its totient is φ = 9346848.

The previous prime is 21923311. The next prime is 21923381. The reversal of 21923342 is 24332912.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1217 + ... + 6732.

It is an arithmetic number, because the mean of its divisors is an integer number (2361150).

Almost surely, 2^21923342 is an apocalyptic number.

21923342 is a deficient number, since it is larger than the sum of its proper divisors (15855058).

21923342 is a wasteful number, since it uses less digits than its factorization.

21923342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8155.

The product of its digits is 2592, while the sum is 26.

The square root of 21923342 is about 4682.2368585965. The cubic root of 21923342 is about 279.8781017011.

The spelling of 21923342 in words is "twenty-one million, nine hundred twenty-three thousand, three hundred forty-two".