20899032 has 128 divisors (see below), whose sum is σ = 66908160. Its totient is φ = 5281920.

The previous prime is 20898953. The next prime is 20899037. The reversal of 20899032 is 23099802.

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 = 20898984 and 20899002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20899037) 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, 79333 + ... + 79595.

It is an arithmetic number, because the mean of its divisors is an integer number (522720).

Almost surely, 2^20899032 is an apocalyptic number.

20899032 is a gapful number since it is divisible by the number (22) 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 20899032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33454080).

20899032 is an abundant number, since it is smaller than the sum of its proper divisors (46009128).

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

20899032 is a wasteful number, since it uses less digits than its factorization.

20899032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 329 counting only the distinct ones).

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

The square root of 20899032 is about 4571.5459092084. The cubic root of 20899032 is about 275.4495435170.

The spelling of 20899032 in words is "twenty million, eight hundred ninety-nine thousand, thirty-two".