20836618452 has 36 divisors (see below), whose sum is σ = 56721907060. Its totient is φ = 6411267072.

The previous prime is 20836618447. The next prime is 20836618469. The reversal of 20836618452 is 25481663802.

20836618452 is a `hidden beast` number, since 20 + 8 + 3 + 6 + 618 + 4 + 5 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1934768196 + 18901850256 = 43986^2 + 137484^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 20836618398 and 20836618407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22260877 + ... + 22261812.

Almost surely, 2^20836618452 is an apocalyptic number.

It is an amenable number.

20836618452 is an abundant number, since it is smaller than the sum of its proper divisors (35885288608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20836618452 is a wasteful number, since it uses less digits than its factorization.

20836618452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44522712 (or 44522707 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 20836618452 in words is "twenty billion, eight hundred thirty-six million, six hundred eighteen thousand, four hundred fifty-two".