20100100087 has 2 divisors, whose sum is σ = 20100100088. Its totient is φ = 20100100086.

The previous prime is 20100100073. The next prime is 20100100147. The reversal of 20100100087 is 78000100102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20100100087 - 2¹⁹ = 20099575799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20100100037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050050043 + 10050050044.

It is an arithmetic number, because the mean of its divisors is an integer number (10050050044).

Almost surely, 2^20100100087 is an apocalyptic number.

20100100087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100100087 is an equidigital number, since it uses as much as digits as its factorization.

20100100087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 20100100087 its reverse (78000100102), we get a palindrome (98100200189).

The spelling of 20100100087 in words is "twenty billion, one hundred million, one hundred thousand, eighty-seven".