20415502320444 has 240 divisors, whose sum is σ = 68833879994880. Its totient is φ = 5119875008640.

The previous prime is 20415502320443. The next prime is 20415502320457. The reversal of 20415502320444 is 44402320551402.

20415502320444 is a `hidden beast` number, since 2 + 0 + 41 + 550 + 2 + 3 + 20 + 4 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20415502320399 and 20415502320408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415502320443) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 13385512 + ... + 14832495.

It is an arithmetic number, because the mean of its divisors is an integer number (286807833312).

Almost surely, 2^{20415502320444} is an apocalyptic number.

It is an amenable number.

20415502320444 is an abundant number, since it is smaller than the sum of its proper divisors (48418377674436).

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

20415502320444 is a wasteful number, since it uses less digits than its factorization.

20415502320444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28218070 (or 28218059 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

Adding to 20415502320444 its reverse (44402320551402), we get a palindrome (64817822871846).

The spelling of 20415502320444 in words is "twenty trillion, four hundred fifteen billion, five hundred two million, three hundred twenty thousand, four hundred forty-four".