20998032 has 40 divisors (see below), whose sum is σ = 59177760. Its totient is φ = 6362880.

The previous prime is 20998031. The next prime is 20998051. The reversal of 20998032 is 23089902.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 20997984 and 20998002.

It is not an unprimeable number, because it can be changed into a prime (20998031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19357 + ... + 20412.

It is an arithmetic number, because the mean of its divisors is an integer number (1479444).

Almost surely, 2^20998032 is an apocalyptic number.

20998032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20998032 is an abundant number, since it is smaller than the sum of its proper divisors (38179728).

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

20998032 is a wasteful number, since it uses less digits than its factorization.

20998032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39791 (or 39785 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 20998032 is about 4582.3609635209. The cubic root of 20998032 is about 275.8837990153.

It can be divided in two parts, 209980 and 32, that added together give a palindrome (210012).

The spelling of 20998032 in words is "twenty million, nine hundred ninety-eight thousand, thirty-two".