30123021530 has 32 divisors (see below), whose sum is σ = 62751767040. Its totient is φ = 10197158400.

The previous prime is 30123021493. The next prime is 30123021557. The reversal of 30123021530 is 3512032103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2718071 + ... + 2729130.

It is an arithmetic number, because the mean of its divisors is an integer number (1960992720).

Almost surely, 2^30123021530 is an apocalyptic number.

30123021530 is an abundant number, since it is smaller than the sum of its proper divisors (32628745510).

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

30123021530 is a wasteful number, since it uses less digits than its factorization.

30123021530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5447294.

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 30123021530 its reverse (3512032103), we get a palindrome (33635053633).

The spelling of 30123021530 in words is "thirty billion, one hundred twenty-three million, twenty-one thousand, five hundred thirty".