1918231452 has 18 divisors (see below), whose sum is σ = 4848862928. Its totient is φ = 639410472.

The previous prime is 1918231429. The next prime is 1918231459. The reversal of 1918231452 is 2541328191.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1918231452² = 7359223806884056608, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 53284207 = 1918231452 / (1 + 9 + 1 + 8 + 2 + 3 + 1 + 4 + 5 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918231459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26642068 + ... + 26642139.

Almost surely, 2^1918231452 is an apocalyptic number.

1918231452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1918231452 is an abundant number, since it is smaller than the sum of its proper divisors (2930631476).

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

1918231452 is a wasteful number, since it uses less digits than its factorization.

1918231452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53284217 (or 53284212 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 1918231452 is about 43797.6192503657. The cubic root of 1918231452 is about 1242.5112678003.

The spelling of 1918231452 in words is "one billion, nine hundred eighteen million, two hundred thirty-one thousand, four hundred fifty-two".