20413154425556 has 6 divisors (see below), whose sum is σ = 35723020244730. Its totient is φ = 10206577212776.

The previous prime is 20413154425519. The next prime is 20413154425583. The reversal of 20413154425556 is 65552445131402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16373191104400 + 4039963321156 = 4046380^2 + 2009966^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20413154425556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2551644303191 + ... + 2551644303198.

It is an arithmetic number, because the mean of its divisors is an integer number (5953836707455).

Almost surely, 2^{20413154425556} is an apocalyptic number.

It is an amenable number.

20413154425556 is a deficient number, since it is larger than the sum of its proper divisors (15309865819174).

20413154425556 is a wasteful number, since it uses less digits than its factorization.

20413154425556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5103288606393 (or 5103288606391 counting only the distinct ones).

The product of its (nonzero) digits is 2880000, while the sum is 47.

Adding to 20413154425556 its reverse (65552445131402), we get a palindrome (85965599556958).

The spelling of 20413154425556 in words is "twenty trillion, four hundred thirteen billion, one hundred fifty-four million, four hundred twenty-five thousand, five hundred fifty-six".