20432215216 has 60 divisors (see below), whose sum is σ = 46242177960. Its totient is φ = 8720248320.

The previous prime is 20432215183. The next prime is 20432215241. The reversal of 20432215216 is 61251223402.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134875 + ... + 243013.

It is an arithmetic number, because the mean of its divisors is an integer number (770702966).

Almost surely, 2^20432215216 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 20432215216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23121088980).

20432215216 is an abundant number, since it is smaller than the sum of its proper divisors (25809962744).

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

20432215216 is a wasteful number, since it uses less digits than its factorization.

20432215216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108402 (or 108389 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 20432215216 its reverse (61251223402), we get a palindrome (81683438618).

The spelling of 20432215216 in words is "twenty billion, four hundred thirty-two million, two hundred fifteen thousand, two hundred sixteen".