20384380 has 24 divisors (see below), whose sum is σ = 43853040. Its totient is φ = 7954560.

The previous prime is 20384363. The next prime is 20384381. The reversal of 20384380 is 8348302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20384381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11610 + ... + 13249.

It is an arithmetic number, because the mean of its divisors is an integer number (1827210).

Almost surely, 2^20384380 is an apocalyptic number.

20384380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20384380 is an abundant number, since it is smaller than the sum of its proper divisors (23468660).

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

20384380 is a wasteful number, since it uses less digits than its factorization.

20384380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24909 (or 24907 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 20384380 is about 4514.9064220646. The cubic root of 20384380 is about 273.1696852392.

It can be divided in two parts, 20 and 384380, that added together give a square (384400 = 620²).

The spelling of 20384380 in words is "twenty million, three hundred eighty-four thousand, three hundred eighty".