20440200140 has 12 divisors (see below), whose sum is σ = 42924420336. Its totient is φ = 8176080048.

The previous prime is 20440200139. The next prime is 20440200149. The reversal of 20440200140 is 4100204402.

It is not an unprimeable number, because it can be changed into a prime (20440200149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511004984 + ... + 511005023.

It is an arithmetic number, because the mean of its divisors is an integer number (3577035028).

Almost surely, 2^20440200140 is an apocalyptic number.

20440200140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20440200140 is an abundant number, since it is smaller than the sum of its proper divisors (22484220196).

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

20440200140 is a wasteful number, since it uses less digits than its factorization.

20440200140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022010016 (or 1022010014 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20440200140 its reverse (4100204402), we get a palindrome (24540404542).

The spelling of 20440200140 in words is "twenty billion, four hundred forty million, two hundred thousand, one hundred forty".