16381925 has 36 divisors (see below), whose sum is σ = 24257376. Its totient is φ = 10936800.

The previous prime is 16381891. The next prime is 16381961. The reversal of 16381925 is 52918361.

Together with 7875450 it forms a betrothed pair.

It is not a de Polignac number, because 16381925 - 2¹⁰ = 16380901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 52520 + ... + 52830.

It is an arithmetic number, because the mean of its divisors is an integer number (673816).

Almost surely, 2^16381925 is an apocalyptic number.

It is an amenable number.

16381925 is a deficient number, since it is larger than the sum of its proper divisors (7875451).

16381925 is a wasteful number, since it uses less digits than its factorization.

16381925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 366 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 16381925 is about 4047.4590794720. The cubic root of 16381925 is about 253.9734456709.

The spelling of 16381925 in words is "sixteen million, three hundred eighty-one thousand, nine hundred twenty-five".