16020491 has 8 divisors (see below), whose sum is σ = 16384368. Its totient is φ = 15660000.

The previous prime is 16020481. The next prime is 16020503. The reversal of 16020491 is 19402061.

It is a happy number.

16020491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16020491 is a prime.

It is a super-2 number, since 2×16020491² = 513312263762162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16020421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10316 + ... + 11766.

It is an arithmetic number, because the mean of its divisors is an integer number (2048046).

Almost surely, 2^16020491 is an apocalyptic number.

16020491 is a deficient number, since it is larger than the sum of its proper divisors (363877).

16020491 is a wasteful number, since it uses less digits than its factorization.

16020491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 16020491 is about 4002.5605554445. The cubic root of 16020491 is about 252.0917350993.

The spelling of 16020491 in words is "sixteen million, twenty thousand, four hundred ninety-one".