20074643 has 2 divisors, whose sum is σ = 20074644. Its totient is φ = 20074642.

The previous prime is 20074619. The next prime is 20074657. The reversal of 20074643 is 34647002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20074643 - 2¹⁰ = 20073619 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20074843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10037321 + 10037322.

It is an arithmetic number, because the mean of its divisors is an integer number (10037322).

Almost surely, 2^20074643 is an apocalyptic number.

20074643 is a deficient number, since it is larger than the sum of its proper divisors (1).

20074643 is an equidigital number, since it uses as much as digits as its factorization.

20074643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20074643 is about 4480.4735240820. The cubic root of 20074643 is about 271.7790295523.

The spelling of 20074643 in words is "twenty million, seventy-four thousand, six hundred forty-three".