20413345415625 has 36 divisors (see below), whose sum is σ = 36855070397964. Its totient is φ = 10887117540000.

The previous prime is 20413345415621. The next prime is 20413345415647. The reversal of 20413345415625 is 52651454331402.

20413345415625 is a `hidden beast` number, since 2 + 0 + 4 + 1 + 3 + 3 + 4 + 5 + 4 + 15 + 625 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 15409856440521 + 5003488975104 = 3925539^2 + 2236848^2 .

It is not a de Polignac number, because 20413345415625 - 2² = 20413345415621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (20413345415621) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 362875794 + ... + 362932043.

It is an arithmetic number, because the mean of its divisors is an integer number (1023751955499).

Almost surely, 2^{20413345415625} is an apocalyptic number.

20413345415625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20413345415625 is a deficient number, since it is larger than the sum of its proper divisors (16441724982339).

20413345415625 is an frugal number, since it uses more digits than its factorization.

20413345415625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725807868 (or 725807845 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

The spelling of 20413345415625 in words is "twenty trillion, four hundred thirteen billion, three hundred forty-five million, four hundred fifteen thousand, six hundred twenty-five".