16357994 has 4 divisors (see below), whose sum is σ = 24536994. Its totient is φ = 8178996.

The previous prime is 16357967. The next prime is 16357997. The reversal of 16357994 is 49975361.

16357994 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49975361 = 2011 ⋅24851.

It can be written as a sum of positive squares in only one way, i.e., 10660225 + 5697769 = 3265^2 + 2387^2 .

It is not an unprimeable number, because it can be changed into a prime (16357997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4089497 + ... + 4089500.

Almost surely, 2^16357994 is an apocalyptic number.

16357994 is a deficient number, since it is larger than the sum of its proper divisors (8179000).

16357994 is an equidigital number, since it uses as much as digits as its factorization.

16357994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8178999.

The product of its digits is 204120, while the sum is 44.

The square root of 16357994 is about 4044.5016998389. The cubic root of 16357994 is about 253.8497157985.

The spelling of 16357994 in words is "sixteen million, three hundred fifty-seven thousand, nine hundred ninety-four".