20307087 has 6 divisors (see below), whose sum is σ = 29332472. Its totient is φ = 13538052.

The previous prime is 20307071. The next prime is 20307103. The reversal of 20307087 is 78070302.

It is an interprime number because it is at equal distance from previous prime (20307071) and next prime (20307103).

It is not a de Polignac number, because 20307087 - 2⁴ = 20307071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20307087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20307037) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1128163 + ... + 1128180.

Almost surely, 2^20307087 is an apocalyptic number.

20307087 is a deficient number, since it is larger than the sum of its proper divisors (9025385).

20307087 is a wasteful number, since it uses less digits than its factorization.

20307087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256349 (or 2256346 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 20307087 is about 4506.3385358848. The cubic root of 20307087 is about 272.8239818544.

Adding to 20307087 its reverse (78070302), we get a palindrome (98377389).

The spelling of 20307087 in words is "twenty million, three hundred seven thousand, eighty-seven".