20332140 has 48 divisors (see below), whose sum is σ = 57480192. Its totient is φ = 5369536.

The previous prime is 20332133. The next prime is 20332159. The reversal of 20332140 is 4123302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4837 + ... + 8003.

It is an arithmetic number, because the mean of its divisors is an integer number (1197504).

Almost surely, 2^20332140 is an apocalyptic number.

20332140 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 20332140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28740096).

20332140 is an abundant number, since it is smaller than the sum of its proper divisors (37148052).

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

20332140 is a wasteful number, since it uses less digits than its factorization.

20332140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286 (or 3284 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 20332140 is about 4509.1174302739. The cubic root of 20332140 is about 272.9361307202.

Adding to 20332140 its reverse (4123302), we get a palindrome (24455442).

The spelling of 20332140 in words is "twenty million, three hundred thirty-two thousand, one hundred forty".