16990502 has 4 divisors (see below), whose sum is σ = 25485756. Its totient is φ = 8495250.

The previous prime is 16990489. The next prime is 16990507. The reversal of 16990502 is 20509961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20509961 = 89 ⋅230449.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16990507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4247624 + ... + 4247627.

It is an arithmetic number, because the mean of its divisors is an integer number (6371439).

Almost surely, 2^16990502 is an apocalyptic number.

16990502 is a deficient number, since it is larger than the sum of its proper divisors (8495254).

16990502 is an equidigital number, since it uses as much as digits as its factorization.

16990502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8495253.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 16990502 is about 4121.9536630098. The cubic root of 16990502 is about 257.0802638066.

The spelling of 16990502 in words is "sixteen million, nine hundred ninety thousand, five hundred two".