16940019 has 8 divisors (see below), whose sum is σ = 23013072. Its totient is φ = 11080160.

The previous prime is 16940009. The next prime is 16940057. The reversal of 16940019 is 91004961.

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

It is a cyclic number.

It is not a de Polignac number, because 16940019 - 2⁸ = 16939763 is a prime.

It is a super-2 number, since 2×16940019² = 573928487440722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16940009) 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, 53112 + ... + 53429.

It is an arithmetic number, because the mean of its divisors is an integer number (2876634).

Almost surely, 2^16940019 is an apocalyptic number.

16940019 is a deficient number, since it is larger than the sum of its proper divisors (6073053).

16940019 is a wasteful number, since it uses less digits than its factorization.

16940019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106597.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 16940019 is about 4115.8254336160. The cubic root of 16940019 is about 256.8253947820.

The spelling of 16940019 in words is "sixteen million, nine hundred forty thousand, nineteen".