20401140424 has 32 divisors (see below), whose sum is σ = 45126950400. Its totient is φ = 8461301760.

The previous prime is 20401140413. The next prime is 20401140469. The reversal of 20401140424 is 42404110402.

It is a junction number, because it is equal to n+sod(n) for n = 20401140395 and 20401140404.

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, 5874169 + ... + 5877640.

It is an arithmetic number, because the mean of its divisors is an integer number (1410217200).

Almost surely, 2^20401140424 is an apocalyptic number.

It is an amenable number.

20401140424 is an abundant number, since it is smaller than the sum of its proper divisors (24725809976).

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

20401140424 is a wasteful number, since it uses less digits than its factorization.

20401140424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11751853 (or 11751849 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 20401140424 its reverse (42404110402), we get a palindrome (62805250826).

The spelling of 20401140424 in words is "twenty billion, four hundred one million, one hundred forty thousand, four hundred twenty-four".