20636315453 has 16 divisors (see below), whose sum is σ = 23536079280. Its totient is φ = 17924514816.

The previous prime is 20636315437. The next prime is 20636315467. The reversal of 20636315453 is 35451363602.

It can be written as a sum of positive squares in 8 ways, for example, as 2363223769 + 18273091684 = 48613^2 + 135178^2 .

It is not a de Polignac number, because 20636315453 - 2⁴ = 20636315437 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 (20636315053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1591151 + ... + 1604067.

It is an arithmetic number, because the mean of its divisors is an integer number (1471004955).

Almost surely, 2^20636315453 is an apocalyptic number.

It is an amenable number.

20636315453 is a deficient number, since it is larger than the sum of its proper divisors (2899763827).

20636315453 is a wasteful number, since it uses less digits than its factorization.

20636315453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20176.

The product of its (nonzero) digits is 194400, while the sum is 38.

The spelling of 20636315453 in words is "twenty billion, six hundred thirty-six million, three hundred fifteen thousand, four hundred fifty-three".