19930386 has 16 divisors (see below), whose sum is σ = 45555264. Its totient is φ = 5694384.

The previous prime is 19930381. The next prime is 19930399. The reversal of 19930386 is 68303991.

It is a super-2 number, since 2×19930386² = 794440572217992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19930381) 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, 237225 + ... + 237308.

It is an arithmetic number, because the mean of its divisors is an integer number (2847204).

Almost surely, 2^19930386 is an apocalyptic number.

19930386 is an abundant number, since it is smaller than the sum of its proper divisors (25624878).

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

19930386 is a wasteful number, since it uses less digits than its factorization.

19930386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474545.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 19930386 is about 4464.3460887346. The cubic root of 19930386 is about 271.1264597723.

The spelling of 19930386 in words is "nineteen million, nine hundred thirty thousand, three hundred eighty-six".