16202993 has 4 divisors (see below), whose sum is σ = 16477680. Its totient is φ = 15928308.

The previous prime is 16202983. The next prime is 16202999. The reversal of 16202993 is 39920261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39920261 = 83 ⋅480967.

It is a cyclic number.

It is not a de Polignac number, because 16202993 - 2²⁰ = 15154417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16202999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137255 + ... + 137372.

It is an arithmetic number, because the mean of its divisors is an integer number (4119420).

Almost surely, 2^16202993 is an apocalyptic number.

It is an amenable number.

16202993 is a deficient number, since it is larger than the sum of its proper divisors (274687).

16202993 is an equidigital number, since it uses as much as digits as its factorization.

16202993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274686.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 16202993 is about 4025.2941507423. The cubic root of 16202993 is about 253.0453813098.

The spelling of 16202993 in words is "sixteen million, two hundred two thousand, nine hundred ninety-three".