16920361 has 4 divisors (see below), whose sum is σ = 17028292. Its totient is φ = 16812432.

The previous prime is 16920347. The next prime is 16920383. The reversal of 16920361 is 16302961.

16920361 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16302961 = 859 ⋅18979.

It can be written as a sum of positive squares in 2 ways, for example, as 2624400 + 14295961 = 1620^2 + 3781^2 .

It is a cyclic number.

It is not a de Polignac number, because 16920361 - 2⁹ = 16919849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16920391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53730 + ... + 54043.

It is an arithmetic number, because the mean of its divisors is an integer number (4257073).

Almost surely, 2^16920361 is an apocalyptic number.

It is an amenable number.

16920361 is a deficient number, since it is larger than the sum of its proper divisors (107931).

16920361 is a wasteful number, since it uses less digits than its factorization.

16920361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107930.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 16920361 is about 4113.4366410582. The cubic root of 16920361 is about 256.7260122138.

The spelling of 16920361 in words is "sixteen million, nine hundred twenty thousand, three hundred sixty-one".