16481901 has 4 divisors (see below), whose sum is σ = 21975872. Its totient is φ = 10987932.

The previous prime is 16481897. The next prime is 16481903. The reversal of 16481901 is 10918461.

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: 10918461 = 3 ⋅3639487.

It is not a de Polignac number, because 16481901 - 2² = 16481897 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 (16481903) 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, 2746981 + ... + 2746986.

It is an arithmetic number, because the mean of its divisors is an integer number (5493968).

Almost surely, 2^16481901 is an apocalyptic number.

It is an amenable number.

16481901 is a deficient number, since it is larger than the sum of its proper divisors (5493971).

16481901 is an equidigital number, since it uses as much as digits as its factorization.

16481901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5493970.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 16481901 is about 4059.7907581549. The cubic root of 16481901 is about 254.4890499288.

The spelling of 16481901 in words is "sixteen million, four hundred eighty-one thousand, nine hundred one".