16420345 has 4 divisors (see below), whose sum is σ = 19704420. Its totient is φ = 13136272.

The previous prime is 16420333. The next prime is 16420373. The reversal of 16420345 is 54302461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3286969 + 13133376 = 1813^2 + 3624^2 .

It is a cyclic number.

It is not a de Polignac number, because 16420345 - 2¹³ = 16412153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1642030 + ... + 1642039.

It is an arithmetic number, because the mean of its divisors is an integer number (4926105).

Almost surely, 2^16420345 is an apocalyptic number.

It is an amenable number.

16420345 is a deficient number, since it is larger than the sum of its proper divisors (3284075).

16420345 is an equidigital number, since it uses as much as digits as its factorization.

16420345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3284074.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 16420345 is about 4052.2024875369. The cubic root of 16420345 is about 254.1718359007.

The spelling of 16420345 in words is "sixteen million, four hundred twenty thousand, three hundred forty-five".