30160021 has 4 divisors (see below), whose sum is σ = 30729132. Its totient is φ = 29590912.

The previous prime is 30159979. The next prime is 30160027. The reversal of 30160021 is 12006103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19236996 + 10923025 = 4386^2 + 3305^2 .

It is a cyclic number.

It is not a de Polignac number, because 30160021 - 2¹⁹ = 29635733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30159983 and 30160010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30160027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284476 + ... + 284581.

It is an arithmetic number, because the mean of its divisors is an integer number (7682283).

Almost surely, 2^30160021 is an apocalyptic number.

It is an amenable number.

30160021 is a deficient number, since it is larger than the sum of its proper divisors (569111).

30160021 is an equidigital number, since it uses as much as digits as its factorization.

30160021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569110.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 30160021 is about 5491.8139990353. The cubic root of 30160021 is about 311.2747405913.

Adding to 30160021 its reverse (12006103), we get a palindrome (42166124).

The spelling of 30160021 in words is "thirty million, one hundred sixty thousand, twenty-one".