30420020 has 24 divisors (see below), whose sum is σ = 64506624. Its totient is φ = 12049056.

The previous prime is 30420001. The next prime is 30420023. The reversal of 30420020 is 2002403.

It is a junction number, because it is equal to n+sod(n) for n = 30419983 and 30420010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30420023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5324 + ... + 9443.

It is an arithmetic number, because the mean of its divisors is an integer number (2687776).

Almost surely, 2^30420020 is an apocalyptic number.

It is an amenable number.

30420020 is an abundant number, since it is smaller than the sum of its proper divisors (34086604).

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

30420020 is a wasteful number, since it uses less digits than its factorization.

30420020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14879 (or 14877 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 30420020 is about 5515.4347063491. The cubic root of 30420020 is about 312.1666461271.

Adding to 30420020 its reverse (2002403), we get a palindrome (32422423).

The spelling of 30420020 in words is "thirty million, four hundred twenty thousand, twenty".