19920386 has 16 divisors (see below), whose sum is σ = 30945024. Its totient is φ = 9611424.

The previous prime is 19920353. The next prime is 19920391. The reversal of 19920386 is 68302991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5411 + ... + 8313.

It is an arithmetic number, because the mean of its divisors is an integer number (1934064).

Almost surely, 2^19920386 is an apocalyptic number.

19920386 is a deficient number, since it is larger than the sum of its proper divisors (11024638).

19920386 is a wasteful number, since it uses less digits than its factorization.

19920386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3025.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 19920386 is about 4463.2259633588. The cubic root of 19920386 is about 271.0811066086.

The spelling of 19920386 in words is "nineteen million, nine hundred twenty thousand, three hundred eighty-six".