16381924 has 12 divisors (see below), whose sum is σ = 30873724. Its totient is φ = 7560864.

The previous prime is 16381891. The next prime is 16381961. The reversal of 16381924 is 42918361.

16381924 = T₈₉₇ + T₈₉₈ + ... + T₉₃₅.

It can be written as a sum of positive squares in 2 ways, for example, as 937024 + 15444900 = 968^2 + 3930^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16381924.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157467 + ... + 157570.

Almost surely, 2^16381924 is an apocalyptic number.

It is an amenable number.

16381924 is a deficient number, since it is larger than the sum of its proper divisors (14491800).

16381924 is a wasteful number, since it uses less digits than its factorization.

16381924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315054 (or 315052 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 16381924 is about 4047.4589559377. The cubic root of 16381924 is about 253.9734405031.

It can be divided in two parts, 16 and 381924, that multiplied together give a square (6110784 = 2472²).

The spelling of 16381924 in words is "sixteen million, three hundred eighty-one thousand, nine hundred twenty-four".