30513020 has 48 divisors (see below), whose sum is σ = 66382848. Its totient is φ = 11773440.

The previous prime is 30512987. The next prime is 30513047. The reversal of 30513020 is 2031503.

It is a junction number, because it is equal to n+sod(n) for n = 30512986 and 30513004.

It is a congruent number.

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, 103994 + ... + 104286.

It is an arithmetic number, because the mean of its divisors is an integer number (1382976).

Almost surely, 2^30513020 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 30513020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33191424).

30513020 is an abundant number, since it is smaller than the sum of its proper divisors (35869828).

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

30513020 is a wasteful number, since it uses less digits than its factorization.

30513020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 30513020 is about 5523.8591582335. The cubic root of 30513020 is about 312.4844408253.

Adding to 30513020 its reverse (2031503), we get a palindrome (32544523).

The spelling of 30513020 in words is "thirty million, five hundred thirteen thousand, twenty".