20072587 has 4 divisors (see below), whose sum is σ = 20103616. Its totient is φ = 20041560.

The previous prime is 20072561. The next prime is 20072617. The reversal of 20072587 is 78527002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78527002 = 2 ⋅39263501.

It is a cyclic number.

It is not a de Polignac number, because 20072587 - 2¹⁵ = 20039819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20072287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14523 + ... + 15844.

It is an arithmetic number, because the mean of its divisors is an integer number (5025904).

Almost surely, 2^20072587 is an apocalyptic number.

20072587 is a deficient number, since it is larger than the sum of its proper divisors (31029).

20072587 is an equidigital number, since it uses as much as digits as its factorization.

20072587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31028.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 20072587 is about 4480.2440781725. The cubic root of 20072587 is about 271.7697509022.

Adding to 20072587 its reverse (78527002), we get a palindrome (98599589).

The spelling of 20072587 in words is "twenty million, seventy-two thousand, five hundred eighty-seven".