1949355018 has 128 divisors (see below), whose sum is σ = 4905331200. Its totient is φ = 569327616.

The previous prime is 1949355013. The next prime is 1949355049. The reversal of 1949355018 is 8105539491.

1949355018 is a `hidden beast` number, since 1 + 9 + 4 + 93 + 550 + 1 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (1949355011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2534538 + ... + 2535306.

It is an arithmetic number, because the mean of its divisors is an integer number (38322900).

Almost surely, 2^1949355018 is an apocalyptic number.

1949355018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1949355018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2452665600).

1949355018 is an abundant number, since it is smaller than the sum of its proper divisors (2955976182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1949355018 is a wasteful number, since it uses less digits than its factorization.

1949355018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 1949355018 is about 44151.5007445953. The cubic root of 1949355018 is about 1249.1952191468.

The spelling of 1949355018 in words is "one billion, nine hundred forty-nine million, three hundred fifty-five thousand, eighteen".