20933438 has 16 divisors (see below), whose sum is σ = 31871760. Its totient is φ = 10310976.

The previous prime is 20933399. The next prime is 20933449. The reversal of 20933438 is 83433902.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50978 + ... + 51386.

It is an arithmetic number, because the mean of its divisors is an integer number (1991985).

Almost surely, 2^20933438 is an apocalyptic number.

20933438 is a deficient number, since it is larger than the sum of its proper divisors (10938322).

20933438 is a wasteful number, since it uses less digits than its factorization.

20933438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 20933438 is about 4575.3074213653. The cubic root of 20933438 is about 275.6006178352.

The spelling of 20933438 in words is "twenty million, nine hundred thirty-three thousand, four hundred thirty-eight".