420520217836 has 24 divisors (see below), whose sum is σ = 808322618880. Its totient is φ = 190533187152.

The previous prime is 420520217797. The next prime is 420520217837. The reversal of 420520217836 is 638712025024.

It is not an unprimeable number, because it can be changed into a prime (420520217837) 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, 120284356 + ... + 120287851.

It is an arithmetic number, because the mean of its divisors is an integer number (33680109120).

Almost surely, 2^420520217836 is an apocalyptic number.

420520217836 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

420520217836 is a deficient number, since it is larger than the sum of its proper divisors (387802401044).

420520217836 is a wasteful number, since it uses less digits than its factorization.

420520217836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240572253 (or 240572251 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 420520217836 in words is "four hundred twenty billion, five hundred twenty million, two hundred seventeen thousand, eight hundred thirty-six".