20132320 has 48 divisors (see below), whose sum is σ = 51226560. Its totient is φ = 7432704.

The previous prime is 20132311. The next prime is 20132341. The reversal of 20132320 is 2323102.

20132320 = T₇₉ + T₈₀ + ... + T₄₉₄.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 20132320.

It is a congruent number.

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, 2760 + ... + 6919.

It is an arithmetic number, because the mean of its divisors is an integer number (1067220).

Almost surely, 2^20132320 is an apocalyptic number.

20132320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20132320 is an abundant number, since it is smaller than the sum of its proper divisors (31094240).

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

20132320 is a wasteful number, since it uses less digits than its factorization.

20132320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9707 (or 9699 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 20132320 is about 4486.9053923612. The cubic root of 20132320 is about 272.0390658999.

Adding to 20132320 its reverse (2323102), we get a palindrome (22455422).

The spelling of 20132320 in words is "twenty million, one hundred thirty-two thousand, three hundred twenty".