1993606818 has 32 divisors (see below), whose sum is σ = 4601066496. Its totient is φ = 564070608.

The previous prime is 1993606793. The next prime is 1993606841. The reversal of 1993606818 is 8186063991.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226096 + ... + 234747.

It is an arithmetic number, because the mean of its divisors is an integer number (143783328).

Almost surely, 2^1993606818 is an apocalyptic number.

1993606818 is an abundant number, since it is smaller than the sum of its proper divisors (2607459678).

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

1993606818 is a wasteful number, since it uses less digits than its factorization.

1993606818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460958.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 1993606818 is about 44649.8243893523. The cubic root of 1993606818 is about 1258.5771327953.

The spelling of 1993606818 in words is "one billion, nine hundred ninety-three million, six hundred six thousand, eight hundred eighteen".