20124290 has 8 divisors (see below), whose sum is σ = 36223740. Its totient is φ = 8049712.

The previous prime is 20124271. The next prime is 20124323. The reversal of 20124290 is 9242102.

It can be written as a sum of positive squares in 2 ways, for example, as 19386409 + 737881 = 4403^2 + 859^2 .

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, 1006205 + ... + 1006224.

Almost surely, 2^20124290 is an apocalyptic number.

20124290 is a deficient number, since it is larger than the sum of its proper divisors (16099450).

20124290 is a wasteful number, since it uses less digits than its factorization.

20124290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012436.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20124290 is about 4486.0104770274. The cubic root of 20124290 is about 272.0028924865.

Adding to 20124290 its reverse (9242102), we get a palindrome (29366392).

The spelling of 20124290 in words is "twenty million, one hundred twenty-four thousand, two hundred ninety".