20345513211 has 6 divisors (see below), whose sum is σ = 29387963540. Its totient is φ = 13563675468.

The previous prime is 20345513207. The next prime is 20345513233. The reversal of 20345513211 is 11231554302.

20345513211 is a `hidden beast` number, since 203 + 455 + 1 + 3 + 2 + 1 + 1 = 666.

It is not a de Polignac number, because 20345513211 - 2² = 20345513207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20345513911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1130306281 + ... + 1130306298.

Almost surely, 2^20345513211 is an apocalyptic number.

20345513211 is a deficient number, since it is larger than the sum of its proper divisors (9042450329).

20345513211 is a wasteful number, since it uses less digits than its factorization.

20345513211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260612585 (or 2260612582 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 20345513211 in words is "twenty billion, three hundred forty-five million, five hundred thirteen thousand, two hundred eleven".