20440402020240 has 40 divisors (see below), whose sum is σ = 63365246263488. Its totient is φ = 5450773872000.

The previous prime is 20440402020209. The next prime is 20440402020257. The reversal of 20440402020240 is 4202020404402.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20440402020240.

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, 42584170636 + ... + 42584171115.

Almost surely, 2^{20440402020240} is an apocalyptic number.

20440402020240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20440402020240 is an abundant number, since it is smaller than the sum of its proper divisors (42924844243248).

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

20440402020240 is a wasteful number, since it uses less digits than its factorization.

20440402020240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85168341767 (or 85168341761 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 20440402020240 its reverse (4202020404402), we get a palindrome (24642422424642).

The spelling of 20440402020240 in words is "twenty trillion, four hundred forty billion, four hundred two million, twenty thousand, two hundred forty".