635420022420 has 96 divisors (see below), whose sum is σ = 1789700774400. Its totient is φ = 168445920384.

The previous prime is 635420022397. The next prime is 635420022421. The reversal of 635420022420 is 24220024536.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (635420022421) 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, 6935671 + ... + 7026689.

It is an arithmetic number, because the mean of its divisors is an integer number (18642716400).

Almost surely, 2^635420022420 is an apocalyptic number.

635420022420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

635420022420 is an abundant number, since it is smaller than the sum of its proper divisors (1154280751980).

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

635420022420 is a wasteful number, since it uses less digits than its factorization.

635420022420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91717 (or 91715 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 635420022420 its reverse (24220024536), we get a palindrome (659640046956).

The spelling of 635420022420 in words is "six hundred thirty-five billion, four hundred twenty million, twenty-two thousand, four hundred twenty".