20166456 has 16 divisors (see below), whose sum is σ = 50416200. Its totient is φ = 6722144.

The previous prime is 20166451. The next prime is 20166463. The reversal of 20166456 is 65466102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20166451) 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, 420111 + ... + 420158.

Almost surely, 2^20166456 is an apocalyptic number.

It is an amenable number.

20166456 is an abundant number, since it is smaller than the sum of its proper divisors (30249744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20166456 is a wasteful number, since it uses less digits than its factorization.

20166456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840278 (or 840274 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 20166456 is about 4490.7077393213. The cubic root of 20166456 is about 272.1927339308.

The spelling of 20166456 in words is "twenty million, one hundred sixty-six thousand, four hundred fifty-six".