20614512187 has 2 divisors, whose sum is σ = 20614512188. Its totient is φ = 20614512186.

The previous prime is 20614512179. The next prime is 20614512199. The reversal of 20614512187 is 78121541602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20614512187 - 2³ = 20614512179 is a prime.

It is a super-2 number, since 2×20614512187² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20614512157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10307256093 + 10307256094.

It is an arithmetic number, because the mean of its divisors is an integer number (10307256094).

Almost surely, 2^20614512187 is an apocalyptic number.

20614512187 is a deficient number, since it is larger than the sum of its proper divisors (1).

20614512187 is an equidigital number, since it uses as much as digits as its factorization.

20614512187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 20614512187 in words is "twenty billion, six hundred fourteen million, five hundred twelve thousand, one hundred eighty-seven".