20345545315 has 4 divisors (see below), whose sum is σ = 24414654384. Its totient is φ = 16276436248.

The previous prime is 20345545313. The next prime is 20345545357. The reversal of 20345545315 is 51354554302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20345545315 - 2¹ = 20345545313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20345545313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2034554527 + ... + 2034554536.

It is an arithmetic number, because the mean of its divisors is an integer number (6103663596).

Almost surely, 2^20345545315 is an apocalyptic number.

20345545315 is a deficient number, since it is larger than the sum of its proper divisors (4069109069).

20345545315 is an equidigital number, since it uses as much as digits as its factorization.

20345545315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069109068.

The product of its (nonzero) digits is 180000, while the sum is 37.

The spelling of 20345545315 in words is "twenty billion, three hundred forty-five million, five hundred forty-five thousand, three hundred fifteen".