20047943 has 2 divisors, whose sum is σ = 20047944. Its totient is φ = 20047942.

The previous prime is 20047921. The next prime is 20047949. The reversal of 20047943 is 34974002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20047943 - 2¹² = 20043847 is a prime.

It is equal to p_1273475 and since 20047943 and 1273475 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20047949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10023971 + 10023972.

It is an arithmetic number, because the mean of its divisors is an integer number (10023972).

Almost surely, 2^20047943 is an apocalyptic number.

20047943 is a deficient number, since it is larger than the sum of its proper divisors (1).

20047943 is an equidigital number, since it uses as much as digits as its factorization.

20047943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20047943 is about 4477.4929369012. The cubic root of 20047943 is about 271.6584841192.

The spelling of 20047943 in words is "twenty million, forty-seven thousand, nine hundred forty-three".