30020555 has 16 divisors (see below), whose sum is σ = 39377664. Its totient is φ = 21872640.

The previous prime is 30020527. The next prime is 30020561. The reversal of 30020555 is 55502003.

It is not a de Polignac number, because 30020555 - 2⁶ = 30020491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3062 + ... + 8331.

It is an arithmetic number, because the mean of its divisors is an integer number (2461104).

Almost surely, 2^30020555 is an apocalyptic number.

30020555 is a deficient number, since it is larger than the sum of its proper divisors (9357109).

30020555 is a wasteful number, since it uses less digits than its factorization.

30020555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11446.

The product of its (nonzero) digits is 750, while the sum is 20.

The square root of 30020555 is about 5479.1016599439. The cubic root of 30020555 is about 310.7942001317.

Adding to 30020555 its reverse (55502003), we get a palindrome (85522558).

The spelling of 30020555 in words is "thirty million, twenty thousand, five hundred fifty-five".