634920020 has 24 divisors (see below), whose sum is σ = 1523808384. Its totient is φ = 217686816.

The previous prime is 634920007. The next prime is 634920031. The reversal of 634920020 is 20029436.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2267432 + ... + 2267711.

It is an arithmetic number, because the mean of its divisors is an integer number (63492016).

Almost surely, 2^634920020 is an apocalyptic number.

It is an amenable number.

634920020 is an abundant number, since it is smaller than the sum of its proper divisors (888888364).

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

634920020 is a wasteful number, since it uses less digits than its factorization.

634920020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535159 (or 4535157 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 634920020 is about 25197.6193319925. The cubic root of 634920020 is about 859.4877154547.

Adding to 634920020 its reverse (20029436), we get a palindrome (654949456).

The spelling of 634920020 in words is "six hundred thirty-four million, nine hundred twenty thousand, twenty".