20385108537 has 8 divisors (see below), whose sum is σ = 27195395904. Its totient is φ = 13582446768.

The previous prime is 20385108521. The next prime is 20385108559. The reversal of 20385108537 is 73580158302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20385108537 - 2⁴ = 20385108521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20385108437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1900158 + ... + 1910855.

It is an arithmetic number, because the mean of its divisors is an integer number (3399424488).

Almost surely, 2^20385108537 is an apocalyptic number.

It is an amenable number.

20385108537 is a deficient number, since it is larger than the sum of its proper divisors (6810287367).

20385108537 is a wasteful number, since it uses less digits than its factorization.

20385108537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3812799.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 20385108537 in words is "twenty billion, three hundred eighty-five million, one hundred eight thousand, five hundred thirty-seven".