30140021 has 8 divisors (see below), whose sum is σ = 30802944. Its totient is φ = 29484000.

The previous prime is 30139999. The next prime is 30140041. The reversal of 30140021 is 12004103.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30140021 - 2⁶ = 30139957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30139984 and 30140011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30140041) 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, 7646 + ... + 10896.

It is an arithmetic number, because the mean of its divisors is an integer number (3850368).

Almost surely, 2^30140021 is an apocalyptic number.

It is an amenable number.

30140021 is a deficient number, since it is larger than the sum of its proper divisors (662923).

30140021 is a wasteful number, since it uses less digits than its factorization.

30140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 30140021 is about 5489.9928050955. The cubic root of 30140021 is about 311.2059202212.

Adding to 30140021 its reverse (12004103), we get a palindrome (42144124).

The spelling of 30140021 in words is "thirty million, one hundred forty thousand, twenty-one".