16981063 has 4 divisors (see below), whose sum is σ = 18524808. Its totient is φ = 15437320.

The previous prime is 16981057. The next prime is 16981073. The reversal of 16981063 is 36018961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36018961 = 11 ⋅3274451.

It is a cyclic number.

It is not a de Polignac number, because 16981063 - 2⁵ = 16981031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16981033) 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, 771856 + ... + 771877.

It is an arithmetic number, because the mean of its divisors is an integer number (4631202).

Almost surely, 2^16981063 is an apocalyptic number.

16981063 is a deficient number, since it is larger than the sum of its proper divisors (1543745).

16981063 is a wasteful number, since it uses less digits than its factorization.

16981063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543744.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 16981063 is about 4120.8085371684. The cubic root of 16981063 is about 257.0326483779.

The spelling of 16981063 in words is "sixteen million, nine hundred eighty-one thousand, sixty-three".