20343777647347 has 64 divisors (see below), whose sum is σ = 25847448883200. Its totient is φ = 15551094096000.

The previous prime is 20343777647339. The next prime is 20343777647449. The reversal of 20343777647347 is 74374677734302.

It is a cyclic number.

It is not a de Polignac number, because 20343777647347 - 2³ = 20343777647339 is a prime.

It is a super-2 number, since 2×20343777647347² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20343777641347) 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 63 ways as a sum of consecutive naturals, for example, 7888241304 + ... + 7888243882.

It is an arithmetic number, because the mean of its divisors is an integer number (403866388800).

Almost surely, 2^{20343777647347} is an apocalyptic number.

20343777647347 is a deficient number, since it is larger than the sum of its proper divisors (5503671235853).

20343777647347 is a wasteful number, since it uses less digits than its factorization.

20343777647347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5608.

The product of its (nonzero) digits is 348509952, while the sum is 64.

The spelling of 20343777647347 in words is "twenty trillion, three hundred forty-three billion, seven hundred seventy-seven million, six hundred forty-seven thousand, three hundred forty-seven".