16920475 has 24 divisors (see below), whose sum is σ = 24654672. Its totient is φ = 11356800.

The previous prime is 16920473. The next prime is 16920481. The reversal of 16920475 is 57402961.

It is not a de Polignac number, because 16920475 - 2¹ = 16920473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16920475.

It is not an unprimeable number, because it can be changed into a prime (16920473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1209 + ... + 5941.

It is an arithmetic number, because the mean of its divisors is an integer number (1027278).

Almost surely, 2^16920475 is an apocalyptic number.

16920475 is a deficient number, since it is larger than the sum of its proper divisors (7734197).

16920475 is a wasteful number, since it uses less digits than its factorization.

16920475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4767 (or 4762 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 16920475 is about 4113.4504980612. The cubic root of 16920475 is about 256.7265887716.

The spelling of 16920475 in words is "sixteen million, nine hundred twenty thousand, four hundred seventy-five".