16420774 has 4 divisors (see below), whose sum is σ = 24631164. Its totient is φ = 8210386.

The previous prime is 16420751. The next prime is 16420777. The reversal of 16420774 is 47702461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47702461 = 227 ⋅210143.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16420777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4105192 + ... + 4105195.

It is an arithmetic number, because the mean of its divisors is an integer number (6157791).

Almost surely, 2^16420774 is an apocalyptic number.

16420774 is a deficient number, since it is larger than the sum of its proper divisors (8210390).

16420774 is an equidigital number, since it uses as much as digits as its factorization.

16420774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8210389.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 16420774 is about 4052.2554213672. The cubic root of 16420774 is about 254.1740493899.

The spelling of 16420774 in words is "sixteen million, four hundred twenty thousand, seven hundred seventy-four".