20344646543365 has 16 divisors (see below), whose sum is σ = 24880077377280. Its totient is φ = 15967340700480.

The previous prime is 20344646543329. The next prime is 20344646543383. The reversal of 20344646543365 is 56334564644302.

It is not a de Polignac number, because 20344646543365 - 2¹³ = 20344646535173 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, 163968031 + ... + 164092060.

It is an arithmetic number, because the mean of its divisors is an integer number (1555004836080).

Almost surely, 2^{20344646543365} is an apocalyptic number.

It is an amenable number.

20344646543365 is a deficient number, since it is larger than the sum of its proper divisors (4535430833915).

20344646543365 is a wasteful number, since it uses less digits than its factorization.

20344646543365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328060332.

The product of its (nonzero) digits is 74649600, while the sum is 55.

The spelling of 20344646543365 in words is "twenty trillion, three hundred forty-four billion, six hundred forty-six million, five hundred forty-three thousand, three hundred sixty-five".