20538134636 has 12 divisors (see below), whose sum is σ = 36706453728. Its totient is φ = 10050576432.

The previous prime is 20538134629. The next prime is 20538134651. The reversal of 20538134636 is 63643183502.

It is a super-3 number, since 3×20538134636³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20538134593 and 20538134602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54622511 + ... + 54622886.

It is an arithmetic number, because the mean of its divisors is an integer number (3058871144).

Almost surely, 2^20538134636 is an apocalyptic number.

It is an amenable number.

20538134636 is a deficient number, since it is larger than the sum of its proper divisors (16168319092).

20538134636 is a wasteful number, since it uses less digits than its factorization.

20538134636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109245448 (or 109245446 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 20538134636 in words is "twenty billion, five hundred thirty-eight million, one hundred thirty-four thousand, six hundred thirty-six".