20195407085 has 12 divisors (see below), whose sum is σ = 28191140028. Its totient is φ = 13848278976.

The previous prime is 20195407069. The next prime is 20195407109. The reversal of 20195407085 is 58070459102.

It can be written as a sum of positive squares in 2 ways, for example, as 13654156201 + 6541250884 = 116851^2 + 80878^2 .

It is not a de Polignac number, because 20195407085 - 2⁴ = 20195407069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41214872 + ... + 41215361.

It is an arithmetic number, because the mean of its divisors is an integer number (2349261669).

Almost surely, 2^20195407085 is an apocalyptic number.

It is an amenable number.

20195407085 is a deficient number, since it is larger than the sum of its proper divisors (7995732943).

20195407085 is an equidigital number, since it uses as much as digits as its factorization.

20195407085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82430252 (or 82430245 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 20195407085 in words is "twenty billion, one hundred ninety-five million, four hundred seven thousand, eighty-five".