18860851943 has 16 divisors (see below), whose sum is σ = 21231792576. Its totient is φ = 16659202560.

The previous prime is 18860851927. The next prime is 18860851973. The reversal of 18860851943 is 34915806881.

It is a cyclic number.

It is not a de Polignac number, because 18860851943 - 2⁴ = 18860851927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18860851913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434348 + ... + 475793.

It is an arithmetic number, because the mean of its divisors is an integer number (1326987036).

Almost surely, 2^18860851943 is an apocalyptic number.

18860851943 is a deficient number, since it is larger than the sum of its proper divisors (2370940633).

18860851943 is a wasteful number, since it uses less digits than its factorization.

18860851943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910234.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 18860851943 in words is "eighteen billion, eight hundred sixty million, eight hundred fifty-one thousand, nine hundred forty-three".