1918249454 has 8 divisors (see below), whose sum is σ = 3138953688. Its totient is φ = 871931560.

The previous prime is 1918249453. The next prime is 1918249483. The reversal of 1918249454 is 4549428191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1918249399 and 1918249408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918249453) 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 3 ways as a sum of consecutive naturals, for example, 43596557 + ... + 43596600.

It is an arithmetic number, because the mean of its divisors is an integer number (392369211).

Almost surely, 2^1918249454 is an apocalyptic number.

1918249454 is a deficient number, since it is larger than the sum of its proper divisors (1220704234).

1918249454 is a wasteful number, since it uses less digits than its factorization.

1918249454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87193170.

The product of its digits is 414720, while the sum is 47.

The square root of 1918249454 is about 43797.8247633373. The cubic root of 1918249454 is about 1242.5151546476.

The spelling of 1918249454 in words is "one billion, nine hundred eighteen million, two hundred forty-nine thousand, four hundred fifty-four".