20533392 has 160 divisors (see below), whose sum is σ = 66960000. Its totient is φ = 5967360.

The previous prime is 20533391. The next prime is 20533427. The reversal of 20533392 is 29333502.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533391) 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, 137734 + ... + 137882.

It is an arithmetic number, because the mean of its divisors is an integer number (418500).

Almost surely, 2^20533392 is an apocalyptic number.

20533392 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 20533392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33480000).

20533392 is an abundant number, since it is smaller than the sum of its proper divisors (46426608).

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

20533392 is a wasteful number, since it uses less digits than its factorization.

20533392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 27.

The square root of 20533392 is about 4531.3785981752. The cubic root of 20533392 is about 273.8337030585.

Adding to 20533392 its reverse (29333502), we get a palindrome (49866894).

It can be divided in two parts, 2053 and 3392, that added together give a palindrome (5445).

The spelling of 20533392 in words is "twenty million, five hundred thirty-three thousand, three hundred ninety-two".