20655432 has 128 divisors (see below), whose sum is σ = 69120000. Its totient is φ = 5583168.

The previous prime is 20655379. The next prime is 20655433. The reversal of 20655432 is 23455602.

20655432 is a `hidden beast` number, since 2 + 0 + 655 + 4 + 3 + 2 = 666.

It is a super-2 number, since 2×20655432² = 853293742213248, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 20655396 and 20655405.

It is not an unprimeable number, because it can be changed into a prime (20655433) 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, 28369 + ... + 29087.

It is an arithmetic number, because the mean of its divisors is an integer number (540000).

Almost surely, 2^20655432 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 20655432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34560000).

20655432 is an abundant number, since it is smaller than the sum of its proper divisors (48464568).

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

20655432 is a wasteful number, since it uses less digits than its factorization.

20655432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 20655432 is about 4544.8247490965. The cubic root of 20655432 is about 274.3751410415.

The spelling of 20655432 in words is "twenty million, six hundred fifty-five thousand, four hundred thirty-two".