20345172207 has 8 divisors (see below), whose sum is σ = 27141480240. Its totient is φ = 13556156160.

The previous prime is 20345172179. The next prime is 20345172209. The reversal of 20345172207 is 70227154302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20345172207 - 2¹¹ = 20345170159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345172209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1816482 + ... + 1827647.

It is an arithmetic number, because the mean of its divisors is an integer number (3392685030).

Almost surely, 2^20345172207 is an apocalyptic number.

20345172207 is a deficient number, since it is larger than the sum of its proper divisors (6796308033).

20345172207 is a wasteful number, since it uses less digits than its factorization.

20345172207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3645993.

The product of its (nonzero) digits is 23520, while the sum is 33.

The spelling of 20345172207 in words is "twenty billion, three hundred forty-five million, one hundred seventy-two thousand, two hundred seven".