18871906060049 has 48 divisors (see below), whose sum is σ = 22800872405520. Its totient is φ = 15555769367040.

The previous prime is 18871906060001. The next prime is 18871906060087. The reversal of 18871906060049 is 94006060917881.

It can be written as a sum of positive squares in 8 ways, for example, as 4259138357824 + 14612767702225 = 2063768^2 + 3822665^2 .

It is not a de Polignac number, because 18871906060049 - 2⁸ = 18871906059793 is a prime.

It is a super-2 number, since 2×18871906060049² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18871906060049.

It is not an unprimeable number, because it can be changed into a prime (18871956060049) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 409692479 + ... + 409738539.

It is an arithmetic number, because the mean of its divisors is an integer number (475018175115).

Almost surely, 2^{18871906060049} is an apocalyptic number.

It is an amenable number.

18871906060049 is a deficient number, since it is larger than the sum of its proper divisors (3928966345471).

18871906060049 is a wasteful number, since it uses less digits than its factorization.

18871906060049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47250 (or 47243 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 59.

The spelling of 18871906060049 in words is "eighteen trillion, eight hundred seventy-one billion, nine hundred six million, sixty thousand, forty-nine".