16953381 has 12 divisors (see below), whose sum is σ = 25395552. Its totient is φ = 11302092.

The previous prime is 16953367. The next prime is 16953383. The reversal of 16953381 is 18335961.

It is a happy number.

It is not a de Polignac number, because 16953381 - 2⁷ = 16953253 is a prime.

It is a super-2 number, since 2×16953381² = 574834254662322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16953383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34641 + ... + 35126.

It is an arithmetic number, because the mean of its divisors is an integer number (2116296).

Almost surely, 2^16953381 is an apocalyptic number.

It is an amenable number.

16953381 is a deficient number, since it is larger than the sum of its proper divisors (8442171).

16953381 is an frugal number, since it uses more digits than its factorization.

16953381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69782 (or 69770 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 16953381 is about 4117.4483603319. The cubic root of 16953381 is about 256.8929035420.

The spelling of 16953381 in words is "sixteen million, nine hundred fifty-three thousand, three hundred eighty-one".