20507542913 has 16 divisors (see below), whose sum is σ = 24165621312. Its totient is φ = 17157096000.

The previous prime is 20507542883. The next prime is 20507542931. The reversal of 20507542913 is 31924570502.

It is not a de Polignac number, because 20507542913 - 2¹⁶ = 20507477377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20507542963) 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 15 ways as a sum of consecutive naturals, for example, 169298 + ... + 263963.

It is an arithmetic number, because the mean of its divisors is an integer number (1510351332).

Almost surely, 2^20507542913 is an apocalyptic number.

It is an amenable number.

20507542913 is a deficient number, since it is larger than the sum of its proper divisors (3658078399).

20507542913 is a wasteful number, since it uses less digits than its factorization.

20507542913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433616.

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 20507542913 in words is "twenty billion, five hundred seven million, five hundred forty-two thousand, nine hundred thirteen".