16994538 has 24 divisors (see below), whose sum is σ = 40169376. Its totient is φ = 5149800.

The previous prime is 16994521. The next prime is 16994561. The reversal of 16994538 is 83549961.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 16994493 and 16994502.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42718 + ... + 43113.

It is an arithmetic number, because the mean of its divisors is an integer number (1673724).

Almost surely, 2^16994538 is an apocalyptic number.

16994538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16994538 is an abundant number, since it is smaller than the sum of its proper divisors (23174838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16994538 is a wasteful number, since it uses less digits than its factorization.

16994538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85850 (or 85847 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 16994538 is about 4122.4432076137. The cubic root of 16994538 is about 257.1006181944.

The spelling of 16994538 in words is "sixteen million, nine hundred ninety-four thousand, five hundred thirty-eight".