20032380 has 48 divisors (see below), whose sum is σ = 62324640. Its totient is φ = 5341824.

The previous prime is 20032373. The next prime is 20032381. The reversal of 20032380 is 8323002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20032381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18009 + ... + 19088.

It is an arithmetic number, because the mean of its divisors is an integer number (1298430).

Almost surely, 2^20032380 is an apocalyptic number.

20032380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20032380 is an abundant number, since it is smaller than the sum of its proper divisors (42292260).

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

20032380 is a wasteful number, since it uses less digits than its factorization.

20032380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37115 (or 37107 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20032380 is about 4475.7546849665. The cubic root of 20032380 is about 271.5881707465.

Adding to 20032380 its reverse (8323002), we get a palindrome (28355382).

The spelling of 20032380 in words is "twenty million, thirty-two thousand, three hundred eighty".