16814021 has 8 divisors (see below), whose sum is σ = 19735680. Its totient is φ = 14022288.

The previous prime is 16814011. The next prime is 16814027. The reversal of 16814021 is 12041861.

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

It is not a de Polignac number, because 16814021 - 2¹⁰ = 16812997 is a prime.

It is a super-2 number, since 2×16814021² = 565422604376882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16814027) 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, 32201 + ... + 32718.

It is an arithmetic number, because the mean of its divisors is an integer number (2466960).

Almost surely, 2^16814021 is an apocalyptic number.

It is an amenable number.

16814021 is a deficient number, since it is larger than the sum of its proper divisors (2921659).

16814021 is an equidigital number, since it uses as much as digits as its factorization.

16814021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64963.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 16814021 is about 4100.4903365329. The cubic root of 16814021 is about 256.1870631872.

Adding to 16814021 its reverse (12041861), we get a palindrome (28855882).

The spelling of 16814021 in words is "sixteen million, eight hundred fourteen thousand, twenty-one".