20173380 has 24 divisors (see below), whose sum is σ = 56485632. Its totient is φ = 5379552.

The previous prime is 20173379. The next prime is 20173397. The reversal of 20173380 is 8337102.

It is a self number, because there is not a number n which added to its sum of digits gives 20173380.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168052 + ... + 168171.

It is an arithmetic number, because the mean of its divisors is an integer number (2353568).

Almost surely, 2^20173380 is an apocalyptic number.

20173380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20173380 is an abundant number, since it is smaller than the sum of its proper divisors (36312252).

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

20173380 is a wasteful number, since it uses less digits than its factorization.

20173380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336235 (or 336233 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 20173380 is about 4491.4785984128. The cubic root of 20173380 is about 272.2238821377.

The spelling of 20173380 in words is "twenty million, one hundred seventy-three thousand, three hundred eighty".