20345031345215 has 16 divisors (see below), whose sum is σ = 24934704508800. Its totient is φ = 15928947682560.

The previous prime is 20345031345193. The next prime is 20345031345239. The reversal of 20345031345215 is 51254313054302.

It is not a de Polignac number, because 20345031345215 - 2¹² = 20345031341119 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, 2722475 + ... + 6935555.

It is an arithmetic number, because the mean of its divisors is an integer number (1558419031800).

Almost surely, 2^{20345031345215} is an apocalyptic number.

20345031345215 is a deficient number, since it is larger than the sum of its proper divisors (4589673163585).

20345031345215 is a wasteful number, since it uses less digits than its factorization.

20345031345215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4233682.

The product of its (nonzero) digits is 216000, while the sum is 38.

Adding to 20345031345215 its reverse (51254313054302), we get a palindrome (71599344399517).

The spelling of 20345031345215 in words is "twenty trillion, three hundred forty-five billion, thirty-one million, three hundred forty-five thousand, two hundred fifteen".