20166422 has 4 divisors (see below), whose sum is σ = 30249636. Its totient is φ = 10083210.

The previous prime is 20166413. The next prime is 20166439. The reversal of 20166422 is 22466102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22466102 = 2 ⋅11233051.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5041604 + ... + 5041607.

It is an arithmetic number, because the mean of its divisors is an integer number (7562409).

Almost surely, 2^20166422 is an apocalyptic number.

20166422 is a deficient number, since it is larger than the sum of its proper divisors (10083214).

20166422 is a wasteful number, since it uses less digits than its factorization.

20166422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10083213.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20166422 is about 4490.7039537249. The cubic root of 20166422 is about 272.1925809613.

The spelling of 20166422 in words is "twenty million, one hundred sixty-six thousand, four hundred twenty-two".