1918125413 has 8 divisors (see below), whose sum is σ = 1960485120. Its totient is φ = 1875830320.

The previous prime is 1918125409. The next prime is 1918125439. The reversal of 1918125413 is 3145218191.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1918125413 - 2² = 1918125409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918125493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46523 + ... + 77463.

It is an arithmetic number, because the mean of its divisors is an integer number (245060640).

Almost surely, 2^1918125413 is an apocalyptic number.

It is an amenable number.

1918125413 is a deficient number, since it is larger than the sum of its proper divisors (42359707).

1918125413 is a wasteful number, since it uses less digits than its factorization.

1918125413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32307.

The product of its digits is 8640, while the sum is 35.

The square root of 1918125413 is about 43796.4086769680. The cubic root of 1918125413 is about 1242.4883722177.

The spelling of 1918125413 in words is "one billion, nine hundred eighteen million, one hundred twenty-five thousand, four hundred thirteen".