16525994 has 4 divisors (see below), whose sum is σ = 24788994. Its totient is φ = 8262996.

The previous prime is 16525963. The next prime is 16526009. The reversal of 16525994 is 49952561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49952561 = 181 ⋅275981.

It can be written as a sum of positive squares in only one way, i.e., 16120225 + 405769 = 4015^2 + 637^2 .

It is a zygodrome in base 4.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4131497 + ... + 4131500.

Almost surely, 2^16525994 is an apocalyptic number.

16525994 is a deficient number, since it is larger than the sum of its proper divisors (8263000).

16525994 is an equidigital number, since it uses as much as digits as its factorization.

16525994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8262999.

The product of its digits is 97200, while the sum is 41.

The square root of 16525994 is about 4065.2175833527. The cubic root of 16525994 is about 254.7157874085.

The spelling of 16525994 in words is "sixteen million, five hundred twenty-five thousand, nine hundred ninety-four".