20655343632 has 160 divisors (see below), whose sum is σ = 66592880640. Its totient is φ = 5359656960.

The previous prime is 20655343619. The next prime is 20655343633. The reversal of 20655343632 is 23634355602.

It is not an unprimeable number, because it can be changed into a prime (20655343633) 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, 4813744 + ... + 4818032.

It is an arithmetic number, because the mean of its divisors is an integer number (416205504).

Almost surely, 2^20655343632 is an apocalyptic number.

20655343632 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 20655343632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33296440320).

20655343632 is an abundant number, since it is smaller than the sum of its proper divisors (45937537008).

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

20655343632 is a wasteful number, since it uses less digits than its factorization.

20655343632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5621 (or 5615 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 39.

The spelling of 20655343632 in words is "twenty billion, six hundred fifty-five million, three hundred forty-three thousand, six hundred thirty-two".