20930242 has 8 divisors (see below), whose sum is σ = 31495356. Its totient is φ = 10431792.

The previous prime is 20930227. The next prime is 20930243. The reversal of 20930242 is 24203902.

It can be written as a sum of positive squares in 2 ways, for example, as 16966161 + 3964081 = 4119^2 + 1991^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20930243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15873 + ... + 17140.

Almost surely, 2^20930242 is an apocalyptic number.

20930242 is a deficient number, since it is larger than the sum of its proper divisors (10565114).

20930242 is a wasteful number, since it uses less digits than its factorization.

20930242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33332.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20930242 is about 4574.9581418850. The cubic root of 20930242 is about 275.5865914021.

The spelling of 20930242 in words is "twenty million, nine hundred thirty thousand, two hundred forty-two".