20010312187 has 2 divisors, whose sum is σ = 20010312188. Its totient is φ = 20010312186.

The previous prime is 20010312169. The next prime is 20010312221. The reversal of 20010312187 is 78121301002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20010312187 - 2⁷ = 20010312059 is a prime.

It is not a weakly prime, because it can be changed into another prime (20010312787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005156093 + 10005156094.

It is an arithmetic number, because the mean of its divisors is an integer number (10005156094).

Almost surely, 2^20010312187 is an apocalyptic number.

20010312187 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010312187 is an equidigital number, since it uses as much as digits as its factorization.

20010312187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 20010312187 its reverse (78121301002), we get a palindrome (98131613189).

The spelling of 20010312187 in words is "twenty billion, ten million, three hundred twelve thousand, one hundred eighty-seven".