32001816 has 64 divisors (see below), whose sum is σ = 99751680. Its totient is φ = 8311680.

The previous prime is 32001811. The next prime is 32001817. The reversal of 32001816 is 61810023.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 32001792 and 32001801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32001811) 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, 6811 + ... + 10506.

It is an arithmetic number, because the mean of its divisors is an integer number (1558620).

Almost surely, 2^32001816 is an apocalyptic number.

It is an amenable number.

32001816 is an abundant number, since it is smaller than the sum of its proper divisors (67749864).

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

32001816 is a wasteful number, since it uses less digits than its factorization.

32001816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17344 (or 17340 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 32001816 is about 5657.0147604545. The cubic root of 32001816 is about 317.4862159473.

Adding to 32001816 its reverse (61810023), we get a palindrome (93811839).

The spelling of 32001816 in words is "thirty-two million, one thousand, eight hundred sixteen".