20832707638645 has 16 divisors (see below), whose sum is σ = 28662437276928. Its totient is φ = 14239351837440.

The previous prime is 20832707638601. The next prime is 20832707638663. The reversal of 20832707638645 is 54683670723802.

It is a happy number.

It is not a de Polignac number, because 20832707638645 - 2⁹ = 20832707638133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 956934804 + ... + 956956573.

It is an arithmetic number, because the mean of its divisors is an integer number (1791402329808).

Almost surely, 2^{20832707638645} is an apocalyptic number.

It is an amenable number.

20832707638645 is a deficient number, since it is larger than the sum of its proper divisors (7829729638283).

20832707638645 is a wasteful number, since it uses less digits than its factorization.

20832707638645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913891700.

The product of its (nonzero) digits is 81285120, while the sum is 61.

The spelling of 20832707638645 in words is "twenty trillion, eight hundred thirty-two billion, seven hundred seven million, six hundred thirty-eight thousand, six hundred forty-five".