20343311772731 has 4 divisors (see below), whose sum is σ = 20343323346000. Its totient is φ = 20343300199464.

The previous prime is 20343311772701. The next prime is 20343311772733. The reversal of 20343311772731 is 13727711334302.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20343311772731 - 2¹⁰ = 20343311771707 is a prime.

It is a super-2 number, since 2×20343311772731² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20343311772733) 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, 2544431 + ... + 6867368.

It is an arithmetic number, because the mean of its divisors is an integer number (5085830836500).

Almost surely, 2^{20343311772731} is an apocalyptic number.

20343311772731 is a deficient number, since it is larger than the sum of its proper divisors (11573269).

20343311772731 is an equidigital number, since it uses as much as digits as its factorization.

20343311772731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11573268.

The product of its (nonzero) digits is 444528, while the sum is 44.

The spelling of 20343311772731 in words is "twenty trillion, three hundred forty-three billion, three hundred eleven million, seven hundred seventy-two thousand, seven hundred thirty-one".