20715120195 has 48 divisors (see below), whose sum is σ = 42060549888. Its totient is φ = 8608877760.

The previous prime is 20715120191. The next prime is 20715120199. The reversal of 20715120195 is 59102151702.

It is an interprime number because it is at equal distance from previous prime (20715120191) and next prime (20715120199).

It is not a de Polignac number, because 20715120195 - 2² = 20715120191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20715120191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1272999 + ... + 1289168.

It is an arithmetic number, because the mean of its divisors is an integer number (876261456).

Almost surely, 2^20715120195 is an apocalyptic number.

20715120195 is an abundant number, since it is smaller than the sum of its proper divisors (21345429693).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20715120195 is a wasteful number, since it uses less digits than its factorization.

20715120195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562200 (or 2562193 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 33.

Adding to 20715120195 its reverse (59102151702), we get a palindrome (79817271897).

The spelling of 20715120195 in words is "twenty billion, seven hundred fifteen million, one hundred twenty thousand, one hundred ninety-five".