30354021 has 10 divisors (see below), whose sum is σ = 45343782. Its totient is φ = 20235960.

The previous prime is 30354019. The next prime is 30354029. The reversal of 30354021 is 12045303.

It can be written as a sum of positive squares in only one way, i.e., 20657025 + 9696996 = 4545^2 + 3114^2 .

It is not a de Polignac number, because 30354021 - 2¹ = 30354019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30353985 and 30354003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30354029) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 187290 + ... + 187451.

Almost surely, 2^30354021 is an apocalyptic number.

It is an amenable number.

30354021 is a deficient number, since it is larger than the sum of its proper divisors (14989761).

30354021 is an equidigital number, since it uses as much as digits as its factorization.

30354021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374753 (or 374744 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 30354021 is about 5509.4483389900. The cubic root of 30354021 is about 311.9407246860.

Adding to 30354021 its reverse (12045303), we get a palindrome (42399324).

It can be divided in two parts, 3035 and 4021, that added together give a square (7056 = 84²).

The spelling of 30354021 in words is "thirty million, three hundred fifty-four thousand, twenty-one".