19860008101 has 2 divisors, whose sum is σ = 19860008102. Its totient is φ = 19860008100.

The previous prime is 19860008057. The next prime is 19860008111. The reversal of 19860008101 is 10180006891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14178617476 + 5681390625 = 119074^2 + 75375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19860008101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19860008111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9930004050 + 9930004051.

It is an arithmetic number, because the mean of its divisors is an integer number (9930004051).

Almost surely, 2^19860008101 is an apocalyptic number.

It is an amenable number.

19860008101 is a deficient number, since it is larger than the sum of its proper divisors (1).

19860008101 is an equidigital number, since it uses as much as digits as its factorization.

19860008101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 34.

The spelling of 19860008101 in words is "nineteen billion, eight hundred sixty million, eight thousand, one hundred one".