16020451 has 4 divisors (see below), whose sum is σ = 16035304. Its totient is φ = 16005600.

The previous prime is 16020449. The next prime is 16020457. The reversal of 16020451 is 15402061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15402061 = 83 ⋅185567.

It is a cyclic number.

It is not a de Polignac number, because 16020451 - 2¹ = 16020449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16020457) 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, 5670 + ... + 8011.

It is an arithmetic number, because the mean of its divisors is an integer number (4008826).

Almost surely, 2^16020451 is an apocalyptic number.

16020451 is a deficient number, since it is larger than the sum of its proper divisors (14853).

16020451 is a wasteful number, since it uses less digits than its factorization.

16020451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14852.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 16020451 is about 4002.5555586400. Note that the first 5 decimals coincide. The cubic root of 16020451 is about 252.0915252914.

It can be divided in two parts, 16020 and 451, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 16020451 in words is "sixteen million, twenty thousand, four hundred fifty-one".