20694943 has 2 divisors, whose sum is σ = 20694944. Its totient is φ = 20694942.

The previous prime is 20694937. The next prime is 20694979. The reversal of 20694943 is 34949602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20694943 - 2¹³ = 20686751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20694983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10347471 + 10347472.

It is an arithmetic number, because the mean of its divisors is an integer number (10347472).

Almost surely, 2^20694943 is an apocalyptic number.

20694943 is a deficient number, since it is larger than the sum of its proper divisors (1).

20694943 is an equidigital number, since it uses as much as digits as its factorization.

20694943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 20694943 is about 4549.1694846422. The cubic root of 20694943 is about 274.5499769102.

The spelling of 20694943 in words is "twenty million, six hundred ninety-four thousand, nine hundred forty-three".