20425400054420 has 24 divisors (see below), whose sum is σ = 42893433317448. Its totient is φ = 8170142268800.

The previous prime is 20425400054377. The next prime is 20425400054429. The reversal of 20425400054420 is 2445000452402.

It can be written as a sum of positive squares in 4 ways, for example, as 9719442230404 + 10705957824016 = 3117602^2 + 3271996^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20425400054429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12245390 + ... + 13813050.

It is an arithmetic number, because the mean of its divisors is an integer number (1787226388227).

Almost surely, 2^{20425400054420} is an apocalyptic number.

20425400054420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20425400054420 is an abundant number, since it is smaller than the sum of its proper divisors (22468033263028).

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

20425400054420 is a wasteful number, since it uses less digits than its factorization.

20425400054420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219131 (or 2219129 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 32.

The spelling of 20425400054420 in words is "twenty trillion, four hundred twenty-five billion, four hundred million, fifty-four thousand, four hundred twenty".