20473380 has 72 divisors (see below), whose sum is σ = 62741952. Its totient is φ = 5403456.

The previous prime is 20473373. The next prime is 20473399. The reversal of 20473380 is 8337402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18729 + ... + 19791.

It is an arithmetic number, because the mean of its divisors is an integer number (871416).

Almost surely, 2^20473380 is an apocalyptic number.

20473380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20473380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31370976).

20473380 is an abundant number, since it is smaller than the sum of its proper divisors (42268572).

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

20473380 is a wasteful number, since it uses less digits than its factorization.

20473380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185 (or 1180 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20473380 is about 4524.7519269016. The cubic root of 20473380 is about 273.5666690186.

The spelling of 20473380 in words is "twenty million, four hundred seventy-three thousand, three hundred eighty".