20943468071 has 4 divisors (see below), whose sum is σ = 21430525512. Its totient is φ = 20456410632.

The previous prime is 20943468047. The next prime is 20943468127. The reversal of 20943468071 is 17086434902.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20943468071 is a prime.

It is a super-2 number, since 2×20943468071² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20943428071) 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, 243528656 + ... + 243528741.

It is an arithmetic number, because the mean of its divisors is an integer number (5357631378).

Almost surely, 2^20943468071 is an apocalyptic number.

20943468071 is a deficient number, since it is larger than the sum of its proper divisors (487057441).

20943468071 is an equidigital number, since it uses as much as digits as its factorization.

20943468071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487057440.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 20943468071 in words is "twenty billion, nine hundred forty-three million, four hundred sixty-eight thousand, seventy-one".