20534272 has 44 divisors (see below), whose sum is σ = 44804736. Its totient is φ = 9328640.

The previous prime is 20534257. The next prime is 20534273. The reversal of 20534272 is 27243502.

It is a tau number, because it is divible by the number of its divisors (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20534273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10353 + ... + 12175.

Almost surely, 2^20534272 is an apocalyptic number.

20534272 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 20534272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22402368).

20534272 is an abundant number, since it is smaller than the sum of its proper divisors (24270464).

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

20534272 is a wasteful number, since it uses less digits than its factorization.

20534272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854 (or 1836 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 20534272 is about 4531.4756978274. The cubic root of 20534272 is about 273.8376149015.

Adding to 20534272 its reverse (27243502), we get a palindrome (47777774).

The spelling of 20534272 in words is "twenty million, five hundred thirty-four thousand, two hundred seventy-two".