1918786955 has 16 divisors (see below), whose sum is σ = 2318284800. Its totient is φ = 1524563040.

The previous prime is 1918786951. The next prime is 1918786981. The reversal of 1918786955 is 5596878191.

It is not a de Polignac number, because 1918786955 - 2² = 1918786951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1918786894 and 1918786903.

It is not an unprimeable number, because it can be changed into a prime (1918786951) 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, 819176 + ... + 821514.

It is an arithmetic number, because the mean of its divisors is an integer number (144892800).

Almost surely, 2^1918786955 is an apocalyptic number.

1918786955 is a deficient number, since it is larger than the sum of its proper divisors (399497845).

1918786955 is a wasteful number, since it uses less digits than its factorization.

1918786955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3394.

The product of its digits is 5443200, while the sum is 59.

The square root of 1918786955 is about 43803.9604944576. The cubic root of 1918786955 is about 1242.6311963452.

The spelling of 1918786955 in words is "one billion, nine hundred eighteen million, seven hundred eighty-six thousand, nine hundred fifty-five".