20166473 has 4 divisors (see below), whose sum is σ = 20362368. Its totient is φ = 19970580.

The previous prime is 20166463. The next prime is 20166481. The reversal of 20166473 is 37466102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20166473 - 2⁸ = 20166217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20166413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97793 + ... + 97998.

It is an arithmetic number, because the mean of its divisors is an integer number (5090592).

Almost surely, 2^20166473 is an apocalyptic number.

It is an amenable number.

20166473 is a deficient number, since it is larger than the sum of its proper divisors (195895).

20166473 is a wasteful number, since it uses less digits than its factorization.

20166473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195894.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20166473 is about 4490.7096321183. The cubic root of 20166473 is about 272.1928104155.

The spelling of 20166473 in words is "twenty million, one hundred sixty-six thousand, four hundred seventy-three".