20402032044 has 96 divisors (see below), whose sum is σ = 51216302592. Its totient is φ = 6297984000.

The previous prime is 20402032037. The next prime is 20402032069. The reversal of 20402032044 is 44023020402.

It is a self number, because there is not a number n which added to its sum of digits gives 20402032044.

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, 9572859 + ... + 9574989.

It is an arithmetic number, because the mean of its divisors is an integer number (533503152).

Almost surely, 2^20402032044 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 20402032044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25608151296).

20402032044 is an abundant number, since it is smaller than the sum of its proper divisors (30814270548).

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

20402032044 is a wasteful number, since it uses less digits than its factorization.

20402032044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887 (or 2885 counting only the distinct ones).

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

Adding to 20402032044 its reverse (44023020402), we get a palindrome (64425052446).

The spelling of 20402032044 in words is "twenty billion, four hundred two million, thirty-two thousand, forty-four".