20401012044 has 288 divisors, whose sum is σ = 66006420480. Its totient is φ = 5172056064.

The previous prime is 20401012031. The next prime is 20401012097. The reversal of 20401012044 is 44021010402.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 21406672 + ... + 21407624.

It is an arithmetic number, because the mean of its divisors is an integer number (229188960).

Almost surely, 2^20401012044 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 20401012044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33003210240).

20401012044 is an abundant number, since it is smaller than the sum of its proper divisors (45605408436).

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

20401012044 is a wasteful number, since it uses less digits than its factorization.

20401012044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269 (or 1264 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20401012044 its reverse (44021010402), we get a palindrome (64422022446).

The spelling of 20401012044 in words is "twenty billion, four hundred one million, twelve thousand, forty-four".