20173922 has 4 divisors (see below), whose sum is σ = 30260886. Its totient is φ = 10086960.

The previous prime is 20173919. The next prime is 20173943. The reversal of 20173922 is 22937102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22937102 = 2 ⋅11468551.

It can be written as a sum of positive squares in only one way, i.e., 20151121 + 22801 = 4489^2 + 151^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20173891 and 20173900.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5043479 + ... + 5043482.

Almost surely, 2^20173922 is an apocalyptic number.

20173922 is a deficient number, since it is larger than the sum of its proper divisors (10086964).

20173922 is a wasteful number, since it uses less digits than its factorization.

20173922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10086963.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20173922 is about 4491.5389344856. The cubic root of 20173922 is about 272.2263200704.

The spelling of 20173922 in words is "twenty million, one hundred seventy-three thousand, nine hundred twenty-two".