420517867420 has 96 divisors (see below), whose sum is σ = 1066454323200. Its totient is φ = 136163199744.

The previous prime is 420517867409. The next prime is 420517867423. The reversal of 420517867420 is 24768715024.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420517867423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 572175 + ... + 1080934.

It is an arithmetic number, because the mean of its divisors is an integer number (11108899200).

Almost surely, 2^420517867420 is an apocalyptic number.

It is an amenable number.

420517867420 is an abundant number, since it is smaller than the sum of its proper divisors (645936455780).

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

420517867420 is a wasteful number, since it uses less digits than its factorization.

420517867420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653227 (or 1653225 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 46.

The spelling of 420517867420 in words is "four hundred twenty billion, five hundred seventeen million, eight hundred sixty-seven thousand, four hundred twenty".