16920386 has 12 divisors (see below), whose sum is σ = 29524518. Its totient is φ = 7251552.

The previous prime is 16920383. The next prime is 16920391. The reversal of 16920386 is 68302961.

It can be written as a sum of positive squares in only one way, i.e., 12996025 + 3924361 = 3605^2 + 1981^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16920383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86231 + ... + 86426.

Almost surely, 2^16920386 is an apocalyptic number.

16920386 is a deficient number, since it is larger than the sum of its proper divisors (12604132).

16920386 is a wasteful number, since it uses less digits than its factorization.

16920386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172673 (or 172666 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 16920386 is about 4113.4396798786. The cubic root of 16920386 is about 256.7261386522.

The spelling of 16920386 in words is "sixteen million, nine hundred twenty thousand, three hundred eighty-six".