20420422032 has 160 divisors (see below), whose sum is σ = 56981352960. Its totient is φ = 6278031360.

The previous prime is 20420422027. The next prime is 20420422067. The reversal of 20420422032 is 23022402402.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25178907 + ... + 25179717.

It is an arithmetic number, because the mean of its divisors is an integer number (356133456).

Almost surely, 2^20420422032 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 20420422032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28490676480).

20420422032 is an abundant number, since it is smaller than the sum of its proper divisors (36560930928).

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

20420422032 is a wasteful number, since it uses less digits than its factorization.

20420422032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421 (or 1415 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 20420422032 its reverse (23022402402), we get a palindrome (43442824434).

The spelling of 20420422032 in words is "twenty billion, four hundred twenty million, four hundred twenty-two thousand, thirty-two".