20933147 has 2 divisors, whose sum is σ = 20933148. Its totient is φ = 20933146.

The previous prime is 20933111. The next prime is 20933177. The reversal of 20933147 is 74133902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20933147 - 2¹⁰ = 20932123 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20933177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10466573 + 10466574.

It is an arithmetic number, because the mean of its divisors is an integer number (10466574).

Almost surely, 2^20933147 is an apocalyptic number.

20933147 is a deficient number, since it is larger than the sum of its proper divisors (1).

20933147 is an equidigital number, since it uses as much as digits as its factorization.

20933147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20933147 is about 4575.2756201130. The cubic root of 20933147 is about 275.5993407691.

The spelling of 20933147 in words is "twenty million, nine hundred thirty-three thousand, one hundred forty-seven".