20836087253 has 4 divisors (see below), whose sum is σ = 20841206988. Its totient is φ = 20830967520.

The previous prime is 20836087219. The next prime is 20836087331. The reversal of 20836087253 is 35278063802.

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 1140210289 + 19695876964 = 33767^2 + 140342^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20836087253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20836077253) 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, 2553758 + ... + 2561903.

It is an arithmetic number, because the mean of its divisors is an integer number (5210301747).

Almost surely, 2^20836087253 is an apocalyptic number.

It is an amenable number.

20836087253 is a deficient number, since it is larger than the sum of its proper divisors (5119735).

20836087253 is an equidigital number, since it uses as much as digits as its factorization.

20836087253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5119734.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 20836087253 in words is "twenty billion, eight hundred thirty-six million, eighty-seven thousand, two hundred fifty-three".