20413344340 has 24 divisors (see below), whose sum is σ = 42914206440. Its totient is φ = 8156540928.

The previous prime is 20413344319. The next prime is 20413344433. The reversal of 20413344340 is 4344331402.

It can be written as a sum of positive squares in 4 ways, for example, as 332187076 + 20081157264 = 18226^2 + 141708^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20413344299 and 20413344308.

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, 530757 + ... + 567916.

It is an arithmetic number, because the mean of its divisors is an integer number (1788091935).

Almost surely, 2^20413344340 is an apocalyptic number.

20413344340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20413344340 is an abundant number, since it is smaller than the sum of its proper divisors (22500862100).

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

20413344340 is a wasteful number, since it uses less digits than its factorization.

20413344340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099611 (or 1099609 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 20413344340 its reverse (4344331402), we get a palindrome (24757675742).

The spelling of 20413344340 in words is "twenty billion, four hundred thirteen million, three hundred forty-four thousand, three hundred forty".