30149493920 has 192 divisors, whose sum is σ = 90494724096. Its totient is φ = 9233879040.

The previous prime is 30149493887. The next prime is 30149493923. The reversal of 30149493920 is 2939494103.

It is not an unprimeable number, because it can be changed into a prime (30149493923) 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, 417962 + ... + 484758.

It is an arithmetic number, because the mean of its divisors is an integer number (471326688).

Almost surely, 2^30149493920 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 30149493920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45247362048).

30149493920 is an abundant number, since it is smaller than the sum of its proper divisors (60345230176).

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

30149493920 is a wasteful number, since it uses less digits than its factorization.

30149493920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66863 (or 66855 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 44.

The spelling of 30149493920 in words is "thirty billion, one hundred forty-nine million, four hundred ninety-three thousand, nine hundred twenty".