20361253 has 4 divisors (see below), whose sum is σ = 22212288. Its totient is φ = 18510220.

The previous prime is 20361241. The next prime is 20361281. The reversal of 20361253 is 35216302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20361253 - 2⁵ = 20361221 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20361353) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 925501 + ... + 925522.

It is an arithmetic number, because the mean of its divisors is an integer number (5553072).

Almost surely, 2^20361253 is an apocalyptic number.

It is an amenable number.

20361253 is a deficient number, since it is larger than the sum of its proper divisors (1851035).

20361253 is a wasteful number, since it uses less digits than its factorization.

20361253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851034.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 20361253 is about 4512.3445125566. The cubic root of 20361253 is about 273.0663383626.

Adding to 20361253 its reverse (35216302), we get a palindrome (55577555).

The spelling of 20361253 in words is "twenty million, three hundred sixty-one thousand, two hundred fifty-three".