20465455253 has 4 divisors (see below), whose sum is σ = 21669305580. Its totient is φ = 19261604928.

The previous prime is 20465455243. The next prime is 20465455261. The reversal of 20465455253 is 35255456402.

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 7409422084 + 13056033169 = 86078^2 + 114263^2 .

It is not a de Polignac number, because 20465455253 - 2²⁴ = 20448678037 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 20465455253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20465455243) 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, 601925138 + ... + 601925171.

It is an arithmetic number, because the mean of its divisors is an integer number (5417326395).

Almost surely, 2^20465455253 is an apocalyptic number.

It is an amenable number.

20465455253 is a deficient number, since it is larger than the sum of its proper divisors (1203850327).

20465455253 is a wasteful number, since it uses less digits than its factorization.

20465455253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203850326.

The product of its (nonzero) digits is 720000, while the sum is 41.

The spelling of 20465455253 in words is "twenty billion, four hundred sixty-five million, four hundred fifty-five thousand, two hundred fifty-three".