20500838601 has 16 divisors (see below), whose sum is σ = 28377682560. Its totient is φ = 13148965760.

The previous prime is 20500838599. The next prime is 20500838639. The reversal of 20500838601 is 10683800502.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20500838601 - 2¹ = 20500838599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20500838641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394845 + ... + 443738.

It is an arithmetic number, because the mean of its divisors is an integer number (1773605160).

Almost surely, 2^20500838601 is an apocalyptic number.

It is an amenable number.

20500838601 is a deficient number, since it is larger than the sum of its proper divisors (7876843959).

20500838601 is a wasteful number, since it uses less digits than its factorization.

20500838601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838896.

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 20500838601 in words is "twenty billion, five hundred million, eight hundred thirty-eight thousand, six hundred one".