20587093 has 6 divisors (see below), whose sum is σ = 21521654. Its totient is φ = 19691496.

The previous prime is 20587087. The next prime is 20587097. The reversal of 20587093 is 39078502.

It can be written as a sum of positive squares in only one way, i.e., 13712209 + 6874884 = 3703^2 + 2622^2 .

It is not a de Polignac number, because 20587093 - 2⁹ = 20586581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20587097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18930 + ... + 19987.

Almost surely, 2^20587093 is an apocalyptic number.

20587093 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20587093 is a deficient number, since it is larger than the sum of its proper divisors (934561).

20587093 is an equidigital number, since it uses as much as digits as its factorization.

20587093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38963 (or 38940 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 20587093 is about 4537.3001884381. The cubic root of 20587093 is about 274.0722144358.

The spelling of 20587093 in words is "twenty million, five hundred eighty-seven thousand, ninety-three".