1918837516 has 6 divisors (see below), whose sum is σ = 3357965660. Its totient is φ = 959418756.

The previous prime is 1918837511. The next prime is 1918837517. The reversal of 1918837516 is 6157388191.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1918837516.

It is not an unprimeable number, because it can be changed into a prime (1918837511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239854686 + ... + 239854693.

Almost surely, 2^1918837516 is an apocalyptic number.

It is an amenable number.

1918837516 is a deficient number, since it is larger than the sum of its proper divisors (1439128144).

1918837516 is a wasteful number, since it uses less digits than its factorization.

1918837516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479709383 (or 479709381 counting only the distinct ones).

The product of its digits is 362880, while the sum is 49.

The square root of 1918837516 is about 43804.5376188358. The cubic root of 1918837516 is about 1242.6421109014.

The spelling of 1918837516 in words is "one billion, nine hundred eighteen million, eight hundred thirty-seven thousand, five hundred sixteen".