20887367 has 2 divisors, whose sum is σ = 20887368. Its totient is φ = 20887366.

The previous prime is 20887333. The next prime is 20887393. The reversal of 20887367 is 76378802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20887367 - 2¹² = 20883271 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20887567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10443683 + 10443684.

It is an arithmetic number, because the mean of its divisors is an integer number (10443684).

Almost surely, 2^20887367 is an apocalyptic number.

20887367 is a deficient number, since it is larger than the sum of its proper divisors (1).

20887367 is an equidigital number, since it uses as much as digits as its factorization.

20887367 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 20887367 is about 4570.2699045024. The cubic root of 20887367 is about 275.3982856897.

The spelling of 20887367 in words is "twenty million, eight hundred eighty-seven thousand, three hundred sixty-seven".