16420947 has 8 divisors (see below), whose sum is σ = 21914880. Its totient is φ = 10937160.

The previous prime is 16420927. The next prime is 16420961. The reversal of 16420947 is 74902461.

It is a happy number.

16420947 is digitally balanced in base 2 and base 4, because in such bases 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 not a de Polignac number, because 16420947 - 2⁷ = 16420819 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (16420927) 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, 2922 + ... + 6432.

It is an arithmetic number, because the mean of its divisors is an integer number (2739360).

Almost surely, 2^16420947 is an apocalyptic number.

16420947 is a deficient number, since it is larger than the sum of its proper divisors (5493933).

16420947 is a wasteful number, since it uses less digits than its factorization.

16420947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5073.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 16420947 is about 4052.2767674481. The cubic root of 16420947 is about 254.1749419982.

The spelling of 16420947 in words is "sixteen million, four hundred twenty thousand, nine hundred forty-seven".