30211020 has 72 divisors (see below), whose sum is σ = 104735904. Its totient is φ = 6905088.

The previous prime is 30211001. The next prime is 30211031. The reversal of 30211020 is 2011203.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 30210993 and 30211011.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10729 + ... + 13248.

Almost surely, 2^30211020 is an apocalyptic number.

30211020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30211020 is an abundant number, since it is smaller than the sum of its proper divisors (74524884).

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

30211020 is a wasteful number, since it uses less digits than its factorization.

30211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23999 (or 23994 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 30211020 is about 5496.4552213222. The cubic root of 30211020 is about 311.4500914985.

Adding to 30211020 its reverse (2011203), we get a palindrome (32222223).

The spelling of 30211020 in words is "thirty million, two hundred eleven thousand, twenty".