30817639420 has 24 divisors (see below), whose sum is σ = 64749598704. Its totient is φ = 12320854656.

The previous prime is 30817639387. The next prime is 30817639439. The reversal of 30817639420 is 2493671803.

It is a super-2 number, since 2×30817639420² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346714 + ... + 426433.

It is an arithmetic number, because the mean of its divisors is an integer number (2697899946).

Almost surely, 2^30817639420 is an apocalyptic number.

It is an amenable number.

30817639420 is an abundant number, since it is smaller than the sum of its proper divisors (33931959284).

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

30817639420 is a wasteful number, since it uses less digits than its factorization.

30817639420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775149 (or 775147 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 30817639420 in words is "thirty billion, eight hundred seventeen million, six hundred thirty-nine thousand, four hundred twenty".