20539332635 has 4 divisors (see below), whose sum is σ = 24647199168. Its totient is φ = 16431466104.

The previous prime is 20539332607. The next prime is 20539332641. The reversal of 20539332635 is 53623393502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20539332635 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 20539332592 and 20539332601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053933259 + ... + 2053933268.

It is an arithmetic number, because the mean of its divisors is an integer number (6161799792).

Almost surely, 2^20539332635 is an apocalyptic number.

20539332635 is a deficient number, since it is larger than the sum of its proper divisors (4107866533).

20539332635 is an equidigital number, since it uses as much as digits as its factorization.

20539332635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4107866532.

The product of its (nonzero) digits is 437400, while the sum is 41.

The spelling of 20539332635 in words is "twenty billion, five hundred thirty-nine million, three hundred thirty-two thousand, six hundred thirty-five".