20425515325434 has 24 divisors (see below), whose sum is σ = 44274943569792. Its totient is φ = 6805480437000.

The previous prime is 20425515325427. The next prime is 20425515325469. The reversal of 20425515325434 is 43452351552402.

20425515325434 is a `hidden beast` number, since 2 + 0 + 4 + 2 + 5 + 51 + 53 + 2 + 543 + 4 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20425515325434.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252014314 + ... + 252095349.

It is an arithmetic number, because the mean of its divisors is an integer number (1844789315408).

Almost surely, 2^{20425515325434} is an apocalyptic number.

20425515325434 is an abundant number, since it is smaller than the sum of its proper divisors (23849428244358).

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

20425515325434 is a wasteful number, since it uses less digits than its factorization.

20425515325434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504111922 (or 504111919 counting only the distinct ones).

The product of its (nonzero) digits is 2880000, while the sum is 45.

Adding to 20425515325434 its reverse (43452351552402), we get a palindrome (63877866877836).

The spelling of 20425515325434 in words is "twenty trillion, four hundred twenty-five billion, five hundred fifteen million, three hundred twenty-five thousand, four hundred thirty-four".