20253042 has 12 divisors (see below), whose sum is σ = 43881630. Its totient is φ = 6751008.

The previous prime is 20253029. The next prime is 20253073. The reversal of 20253042 is 24035202.

It can be written as a sum of positive squares in only one way, i.e., 19000881 + 1252161 = 4359^2 + 1119^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1125169 = 20253042 / (2 + 0 + 2 + 5 + 3 + 0 + 4 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 562567 + ... + 562602.

Almost surely, 2^20253042 is an apocalyptic number.

20253042 is an abundant number, since it is smaller than the sum of its proper divisors (23628588).

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

20253042 is a wasteful number, since it uses less digits than its factorization.

20253042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125177 (or 1125174 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20253042 is about 4500.3379873072. The cubic root of 20253042 is about 272.5817368361.

Adding to 20253042 its reverse (24035202), we get a palindrome (44288244).

The spelling of 20253042 in words is "twenty million, two hundred fifty-three thousand, forty-two".