20166573 has 16 divisors (see below), whose sum is σ = 32538240. Its totient is φ = 10845696.

The previous prime is 20166557. The next prime is 20166583. The reversal of 20166573 is 37566102.

It is not a de Polignac number, because 20166573 - 2⁴ = 20166557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20166573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20166583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27888 + ... + 28601.

It is an arithmetic number, because the mean of its divisors is an integer number (2033640).

Almost surely, 2^20166573 is an apocalyptic number.

It is an amenable number.

20166573 is a deficient number, since it is larger than the sum of its proper divisors (12371667).

20166573 is a wasteful number, since it uses less digits than its factorization.

20166573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56516.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 20166573 is about 4490.7207662022. The cubic root of 20166573 is about 272.1932603245.

The spelling of 20166573 in words is "twenty million, one hundred sixty-six thousand, five hundred seventy-three".