2051868859973 has 2 divisors, whose sum is σ = 2051868859974. Its totient is φ = 2051868859972.

The previous prime is 2051868859913. The next prime is 2051868860017. The reversal of 2051868859973 is 3799588681502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2045866794244 + 6002065729 = 1430338^2 + 77473^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051868859973 - 2¹² = 2051868855877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2051868859897 and 2051868859906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2051868859913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025934429986 + 1025934429987.

It is an arithmetic number, because the mean of its divisors is an integer number (1025934429987).

Almost surely, 2^{2051868859973} is an apocalyptic number.

It is an amenable number.

2051868859973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051868859973 is an equidigital number, since it uses as much as digits as its factorization.

2051868859973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 261273600, while the sum is 71.

The spelling of 2051868859973 in words is "two trillion, fifty-one billion, eight hundred sixty-eight million, eight hundred fifty-nine thousand, nine hundred seventy-three".