20551034253 has 4 divisors (see below), whose sum is σ = 27401379008. Its totient is φ = 13700689500.

The previous prime is 20551034191. The next prime is 20551034363. The reversal of 20551034253 is 35243015502.

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 not a de Polignac number, because 20551034253 - 2¹⁰ = 20551033229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20551034253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20551032253) 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, 3425172373 + ... + 3425172378.

It is an arithmetic number, because the mean of its divisors is an integer number (6850344752).

Almost surely, 2^20551034253 is an apocalyptic number.

It is an amenable number.

20551034253 is a deficient number, since it is larger than the sum of its proper divisors (6850344755).

20551034253 is an equidigital number, since it uses as much as digits as its factorization.

20551034253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6850344754.

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 20551034253 its reverse (35243015502), we get a palindrome (55794049755).

The spelling of 20551034253 in words is "twenty billion, five hundred fifty-one million, thirty-four thousand, two hundred fifty-three".