20290153 has 4 divisors (see below), whose sum is σ = 21850948. Its totient is φ = 18729360.

The previous prime is 20290147. The next prime is 20290183. The reversal of 20290153 is 35109202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10969344 + 9320809 = 3312^2 + 3053^2 .

It is not a de Polignac number, because 20290153 - 2⁹ = 20289641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20290133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780378 + ... + 780403.

It is an arithmetic number, because the mean of its divisors is an integer number (5462737).

Almost surely, 2^20290153 is an apocalyptic number.

It is an amenable number.

20290153 is a deficient number, since it is larger than the sum of its proper divisors (1560795).

20290153 is a wasteful number, since it uses less digits than its factorization.

20290153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560794.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 20290153 is about 4504.4592350248. The cubic root of 20290153 is about 272.7481251497.

Adding to 20290153 its reverse (35109202), we get a palindrome (55399355).

The spelling of 20290153 in words is "twenty million, two hundred ninety thousand, one hundred fifty-three".