20401401044 has 24 divisors (see below), whose sum is σ = 35833052808. Its totient is φ = 10163419520.

The previous prime is 20401401037. The next prime is 20401401073. The reversal of 20401401044 is 44010410402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8609612944 + 11791788100 = 92788^2 + 108590^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4538462 + ... + 4542954.

It is an arithmetic number, because the mean of its divisors is an integer number (1493043867).

Almost surely, 2^20401401044 is an apocalyptic number.

It is an amenable number.

20401401044 is a deficient number, since it is larger than the sum of its proper divisors (15431651764).

20401401044 is a wasteful number, since it uses less digits than its factorization.

20401401044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8395 (or 8393 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20401401044 its reverse (44010410402), we get a palindrome (64411811446).

The spelling of 20401401044 in words is "twenty billion, four hundred one million, four hundred one thousand, forty-four".