16220774 has 4 divisors (see below), whose sum is σ = 24331164. Its totient is φ = 8110386.

The previous prime is 16220759. The next prime is 16220779. The reversal of 16220774 is 47702261.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×16220774² = 526227018318152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16220779) by changing a digit.

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 as a sum of consecutive naturals, namely, 4055192 + ... + 4055195.

It is an arithmetic number, because the mean of its divisors is an integer number (6082791).

Almost surely, 2^16220774 is an apocalyptic number.

16220774 is a deficient number, since it is larger than the sum of its proper divisors (8110390).

16220774 is an equidigital number, since it uses as much as digits as its factorization.

16220774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8110389.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 16220774 is about 4027.5022035996. The cubic root of 16220774 is about 253.1379106152.

The spelling of 16220774 in words is "sixteen million, two hundred twenty thousand, seven hundred seventy-four".