20460887 has 2 divisors, whose sum is σ = 20460888. Its totient is φ = 20460886.

The previous prime is 20460871. The next prime is 20460893. The reversal of 20460887 is 78806402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20460887 - 2⁴ = 20460871 is a prime.

It is equal to p_1297934 and since 20460887 and 1297934 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 (20460857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10230443 + 10230444.

It is an arithmetic number, because the mean of its divisors is an integer number (10230444).

Almost surely, 2^20460887 is an apocalyptic number.

20460887 is a deficient number, since it is larger than the sum of its proper divisors (1).

20460887 is an equidigital number, since it uses as much as digits as its factorization.

20460887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 20460887 is about 4523.3711985642. The cubic root of 20460887 is about 273.5110135968.

The spelling of 20460887 in words is "twenty million, four hundred sixty thousand, eight hundred eighty-seven".