30555020 has 24 divisors (see below), whose sum is σ = 64325184. Its totient is φ = 12191616.

The previous prime is 30555013. The next prime is 30555023. The reversal of 30555020 is 2055503.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 30554983 and 30555001.

It is not an unprimeable number, because it can be changed into a prime (30555023) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7469 + ... + 10811.

It is an arithmetic number, because the mean of its divisors is an integer number (2680216).

Almost surely, 2^30555020 is an apocalyptic number.

It is an amenable number.

30555020 is an abundant number, since it is smaller than the sum of its proper divisors (33770164).

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

30555020 is a wasteful number, since it uses less digits than its factorization.

30555020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809 (or 3807 counting only the distinct ones).

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

The square root of 30555020 is about 5527.6595408907. The cubic root of 30555020 is about 312.6277493692.

The spelling of 30555020 in words is "thirty million, five hundred fifty-five thousand, twenty".