20468827187 has 2 divisors, whose sum is σ = 20468827188. Its totient is φ = 20468827186.

The previous prime is 20468827153. The next prime is 20468827229. The reversal of 20468827187 is 78172886402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20468827187 is a prime.

It is a super-2 number, since 2×20468827187² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20468827117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10234413593 + 10234413594.

It is an arithmetic number, because the mean of its divisors is an integer number (10234413594).

Almost surely, 2^20468827187 is an apocalyptic number.

20468827187 is a deficient number, since it is larger than the sum of its proper divisors (1).

20468827187 is an equidigital number, since it uses as much as digits as its factorization.

20468827187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2408448, while the sum is 53.

The spelling of 20468827187 in words is "twenty billion, four hundred sixty-eight million, eight hundred twenty-seven thousand, one hundred eighty-seven".