32320020 has 96 divisors (see below), whose sum is σ = 94284288. Its totient is φ = 8266752.

The previous prime is 32320019. The next prime is 32320021. The reversal of 32320020 is 2002323.

It is an interprime number because it is at equal distance from previous prime (32320019) and next prime (32320021).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 32319978 and 32320005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32320021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205782 + ... + 205938.

It is an arithmetic number, because the mean of its divisors is an integer number (982128).

Almost surely, 2^32320020 is an apocalyptic number.

32320020 is a gapful number since it is divisible by the number (30) 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 32320020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47142144).

32320020 is an abundant number, since it is smaller than the sum of its proper divisors (61964268).

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

32320020 is a wasteful number, since it uses less digits than its factorization.

32320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 32320020 is about 5685.0699204143. The cubic root of 32320020 is about 318.5350353760.

Adding to 32320020 its reverse (2002323), we get a palindrome (34322343).

The spelling of 32320020 in words is "thirty-two million, three hundred twenty thousand, twenty".