20662512043 has 2 divisors, whose sum is σ = 20662512044. Its totient is φ = 20662512042.

The previous prime is 20662512007. The next prime is 20662512053. The reversal of 20662512043 is 34021526602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20662512043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20662511996 and 20662512014.

It is not a weakly prime, because it can be changed into another prime (20662512053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10331256021 + 10331256022.

It is an arithmetic number, because the mean of its divisors is an integer number (10331256022).

Almost surely, 2^20662512043 is an apocalyptic number.

20662512043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20662512043 is an equidigital number, since it uses as much as digits as its factorization.

20662512043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The spelling of 20662512043 in words is "twenty billion, six hundred sixty-two million, five hundred twelve thousand, forty-three".