20541615453 has 12 divisors (see below), whose sum is σ = 29756244700. Its totient is φ = 13655169216.

The previous prime is 20541615421. The next prime is 20541615461. The reversal of 20541615453 is 35451614502.

20541615453 is a `hidden beast` number, since 2 + 0 + 54 + 1 + 61 + 545 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15600509604 + 4941105849 = 124902^2 + 70293^2 .

It is not a de Polignac number, because 20541615453 - 2⁵ = 20541615421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541695453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3266776 + ... + 3273057.

Almost surely, 2^20541615453 is an apocalyptic number.

It is an amenable number.

20541615453 is a deficient number, since it is larger than the sum of its proper divisors (9214629247).

20541615453 is a wasteful number, since it uses less digits than its factorization.

20541615453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6540188 (or 6540185 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 20541615453 in words is "twenty billion, five hundred forty-one million, six hundred fifteen thousand, four hundred fifty-three".