20535808337 has 4 divisors (see below), whose sum is σ = 22402700016. Its totient is φ = 18668916660.

The previous prime is 20535808303. The next prime is 20535808373. The reversal of 20535808337 is 73380853502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20535808337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20535801337) by changing a digit.

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, 933445823 + ... + 933445844.

It is an arithmetic number, because the mean of its divisors is an integer number (5600675004).

Almost surely, 2^20535808337 is an apocalyptic number.

It is an amenable number.

20535808337 is a deficient number, since it is larger than the sum of its proper divisors (1866891679).

20535808337 is a wasteful number, since it uses less digits than its factorization.

20535808337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866891678.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 20535808337 in words is "twenty billion, five hundred thirty-five million, eight hundred eight thousand, three hundred thirty-seven".