20131942 has 4 divisors (see below), whose sum is σ = 30197916. Its totient is φ = 10065970.

The previous prime is 20131939. The next prime is 20131981. The reversal of 20131942 is 24913102.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 5032984 + ... + 5032987.

It is an arithmetic number, because the mean of its divisors is an integer number (7549479).

Almost surely, 2^20131942 is an apocalyptic number.

20131942 is a deficient number, since it is larger than the sum of its proper divisors (10065974).

20131942 is a wasteful number, since it uses less digits than its factorization.

20131942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10065973.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20131942 is about 4486.8632695905. The cubic root of 20131942 is about 272.0373633074.

The spelling of 20131942 in words is "twenty million, one hundred thirty-one thousand, nine hundred forty-two".