20540942 has 8 divisors (see below), whose sum is σ = 30840456. Its totient is φ = 10260792.

The previous prime is 20540921. The next prime is 20540951. The reversal of 20540942 is 24904502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1808 + ... + 6659.

It is an arithmetic number, because the mean of its divisors is an integer number (3855057).

Almost surely, 2^20540942 is an apocalyptic number.

20540942 is a deficient number, since it is larger than the sum of its proper divisors (10299514).

20540942 is a wasteful number, since it uses less digits than its factorization.

20540942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9682.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20540942 is about 4532.2116014149. The cubic root of 20540942 is about 273.8672612599.

The spelling of 20540942 in words is "twenty million, five hundred forty thousand, nine hundred forty-two".