20025987 has 8 divisors (see below), whose sum is σ = 26722320. Its totient is φ = 13340160.

The previous prime is 20025959. The next prime is 20025989. The reversal of 20025987 is 78952002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20025987 - 2⁶ = 20025923 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20025989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4939 + ... + 8027.

It is an arithmetic number, because the mean of its divisors is an integer number (3340290).

Almost surely, 2^20025987 is an apocalyptic number.

20025987 is a deficient number, since it is larger than the sum of its proper divisors (6696333).

20025987 is a wasteful number, since it uses less digits than its factorization.

20025987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5253.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 20025987 is about 4475.0404467446. The cubic root of 20025987 is about 271.5592767274.

Adding to 20025987 its reverse (78952002), we get a palindrome (98977989).

It can be divided in two parts, 20025 and 987, that added together give a palindrome (21012).

The spelling of 20025987 in words is "twenty million, twenty-five thousand, nine hundred eighty-seven".