20540832 has 96 divisors (see below), whose sum is σ = 58988160. Its totient is φ = 6220800.

The previous prime is 20540831. The next prime is 20540837. The reversal of 20540832 is 23804502.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20540831) 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, 135957 + ... + 136107.

It is an arithmetic number, because the mean of its divisors is an integer number (614460).

Almost surely, 2^20540832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20540832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29494080).

20540832 is an abundant number, since it is smaller than the sum of its proper divisors (38447328).

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

20540832 is a wasteful number, since it uses less digits than its factorization.

20540832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20540832 is about 4532.1994660429. The cubic root of 20540832 is about 273.8667723915.

The spelling of 20540832 in words is "twenty million, five hundred forty thousand, eight hundred thirty-two".