9138655020 has 96 divisors (see below), whose sum is σ = 27958887936. Its totient is φ = 2211904000.

The previous prime is 9138654953. The next prime is 9138655027. The reversal of 9138655020 is 205568319.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 9138655020.

It is not an unprimeable number, because it can be changed into a prime (9138655027) 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, 416320 + ... + 437720.

It is an arithmetic number, because the mean of its divisors is an integer number (291238416).

Almost surely, 2^9138655020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9138655020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13979443968).

9138655020 is an abundant number, since it is smaller than the sum of its proper divisors (18820232916).

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

9138655020 is a wasteful number, since it uses less digits than its factorization.

9138655020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22071 (or 22069 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 9138655020 is about 95596.3127950027. The cubic root of 9138655020 is about 2090.7114341210.

The spelling of 9138655020 in words is "nine billion, one hundred thirty-eight million, six hundred fifty-five thousand, twenty".