20103002891 has 2 divisors, whose sum is σ = 20103002892. Its totient is φ = 20103002890.

The previous prime is 20103002849. The next prime is 20103002897. The reversal of 20103002891 is 19820030102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20103002891 - 2⁶ = 20103002827 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20103002891.

It is not a weakly prime, because it can be changed into another prime (20103002897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051501445 + 10051501446.

It is an arithmetic number, because the mean of its divisors is an integer number (10051501446).

Almost surely, 2^20103002891 is an apocalyptic number.

20103002891 is a deficient number, since it is larger than the sum of its proper divisors (1).

20103002891 is an equidigital number, since it uses as much as digits as its factorization.

20103002891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 20103002891 its reverse (19820030102), we get a palindrome (39923032993).

The spelling of 20103002891 in words is "twenty billion, one hundred three million, two thousand, eight hundred ninety-one".