20940242 has 8 divisors (see below), whose sum is σ = 33063600. Its totient is φ = 9919044.

The previous prime is 20940203. The next prime is 20940251. The reversal of 20940242 is 24204902.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275492 + ... + 275567.

It is an arithmetic number, because the mean of its divisors is an integer number (4132950).

Almost surely, 2^20940242 is an apocalyptic number.

20940242 is a deficient number, since it is larger than the sum of its proper divisors (12123358).

20940242 is a wasteful number, since it uses less digits than its factorization.

20940242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551080.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20940242 is about 4576.0509175489. The cubic root of 20940242 is about 275.6304741107.

The spelling of 20940242 in words is "twenty million, nine hundred forty thousand, two hundred forty-two".