20047242 has 16 divisors (see below), whose sum is σ = 42204960. Its totient is φ = 6330672.

The previous prime is 20047241. The next prime is 20047253. The reversal of 20047242 is 24274002.

It is not an unprimeable number, because it can be changed into a prime (20047241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87813 + ... + 88040.

It is an arithmetic number, because the mean of its divisors is an integer number (2637810).

Almost surely, 2^20047242 is an apocalyptic number.

20047242 is an abundant number, since it is smaller than the sum of its proper divisors (22157718).

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

20047242 is a wasteful number, since it uses less digits than its factorization.

20047242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175877.

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 20047242 is about 4477.4146558031. The cubic root of 20047242 is about 271.6553177957.

The spelling of 20047242 in words is "twenty million, forty-seven thousand, two hundred forty-two".