20943942 has 16 divisors (see below), whose sum is σ = 42057792. Its totient is φ = 6953000.

The previous prime is 20943931. The next prime is 20943943. The reversal of 20943942 is 24934902.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20943943) 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 7 ways as a sum of consecutive naturals, for example, 5448 + ... + 8459.

It is an arithmetic number, because the mean of its divisors is an integer number (2628612).

Almost surely, 2^20943942 is an apocalyptic number.

20943942 is an abundant number, since it is smaller than the sum of its proper divisors (21113850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20943942 is a wasteful number, since it uses less digits than its factorization.

20943942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14163.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 20943942 is about 4576.4551784105. The cubic root of 20943942 is about 275.6467071720.

The spelling of 20943942 in words is "twenty million, nine hundred forty-three thousand, nine hundred forty-two".