20440400413 has 8 divisors (see below), whose sum is σ = 20512103040. Its totient is φ = 20368811040.

The previous prime is 20440400377. The next prime is 20440400417. The reversal of 20440400413 is 31400404402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20440400413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440400417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341698 + ... + 397036.

It is an arithmetic number, because the mean of its divisors is an integer number (2564012880).

Almost surely, 2^20440400413 is an apocalyptic number.

It is an amenable number.

20440400413 is a deficient number, since it is larger than the sum of its proper divisors (71702627).

20440400413 is an equidigital number, since it uses as much as digits as its factorization.

20440400413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56627.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20440400413 its reverse (31400404402), we get a palindrome (51840804815).

The spelling of 20440400413 in words is "twenty billion, four hundred forty million, four hundred thousand, four hundred thirteen".