20529432 has 216 divisors, whose sum is σ = 73759140. Its totient is φ = 5100480.

The previous prime is 20529427. The next prime is 20529433. The reversal of 20529432 is 23492502.

20529432 is a `hidden beast` number, since 205 + 29 + 432 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20529396 and 20529405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20529433) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 892573 + ... + 892595.

Almost surely, 2^20529432 is an apocalyptic number.

20529432 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 20529432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36879570).

20529432 is an abundant number, since it is smaller than the sum of its proper divisors (53229708).

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

20529432 is a wasteful number, since it uses less digits than its factorization.

20529432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20529432 is about 4530.9416239894. The cubic root of 20529432 is about 273.8160983818.

The spelling of 20529432 in words is "twenty million, five hundred twenty-nine thousand, four hundred thirty-two".