1986804995 has 16 divisors (see below), whose sum is σ = 2726952960. Its totient is φ = 1361284704.

The previous prime is 1986804991. The next prime is 1986805031. The reversal of 1986804995 is 5994086891.

It is a cyclic number.

It is not a de Polignac number, because 1986804995 - 2² = 1986804991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1986804991) 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, 22574 + ... + 66956.

It is an arithmetic number, because the mean of its divisors is an integer number (170434560).

Almost surely, 2^1986804995 is an apocalyptic number.

1986804995 is a deficient number, since it is larger than the sum of its proper divisors (740147965).

1986804995 is a wasteful number, since it uses less digits than its factorization.

1986804995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45674.

The product of its (nonzero) digits is 5598720, while the sum is 59.

The square root of 1986804995 is about 44573.5907797431. The cubic root of 1986804995 is about 1257.1441566330.

The spelling of 1986804995 in words is "one billion, nine hundred eighty-six million, eight hundred four thousand, nine hundred ninety-five".