16920774 has 48 divisors (see below), whose sum is σ = 39809952. Its totient is φ = 5163264.

The previous prime is 16920751. The next prime is 16920793. The reversal of 16920774 is 47702961.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38862 + ... + 39294.

It is an arithmetic number, because the mean of its divisors is an integer number (829374).

Almost surely, 2^16920774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16920774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19904976).

16920774 is an abundant number, since it is smaller than the sum of its proper divisors (22889178).

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

16920774 is a wasteful number, since it uses less digits than its factorization.

16920774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 16920774 is about 4113.4868420842. The cubic root of 16920774 is about 256.7281009593.

The spelling of 16920774 in words is "sixteen million, nine hundred twenty thousand, seven hundred seventy-four".