420205015520 has 24 divisors (see below), whose sum is σ = 992734349544. Its totient is φ = 168082006144.

The previous prime is 420205015457. The next prime is 420205015577. The reversal of 420205015520 is 25510502024.

It is a self number, because there is not a number n which added to its sum of digits gives 420205015520.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1313140514 + ... + 1313140833.

It is an arithmetic number, because the mean of its divisors is an integer number (41363931231).

Almost surely, 2^420205015520 is an apocalyptic number.

420205015520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420205015520 is an abundant number, since it is smaller than the sum of its proper divisors (572529334024).

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

420205015520 is a wasteful number, since it uses less digits than its factorization.

420205015520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626281362 (or 2626281354 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

Adding to 420205015520 its reverse (25510502024), we get a palindrome (445715517544).

The spelling of 420205015520 in words is "four hundred twenty billion, two hundred five million, fifteen thousand, five hundred twenty".