20014021 has 2 divisors, whose sum is σ = 20014022. Its totient is φ = 20014020.

The previous prime is 20014009. The next prime is 20014051. The reversal of 20014021 is 12041002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17969121 + 2044900 = 4239^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 20014021 - 2⁷ = 20013893 is a prime.

It is a super-2 number, since 2×20014021² = 801122073176882, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20013989 and 20014007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20014051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007010 + 10007011.

It is an arithmetic number, because the mean of its divisors is an integer number (10007011).

Almost surely, 2^20014021 is an apocalyptic number.

It is an amenable number.

20014021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20014021 is an equidigital number, since it uses as much as digits as its factorization.

20014021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 20014021 is about 4473.7032758108. The cubic root of 20014021 is about 271.5051782581.

Adding to 20014021 its reverse (12041002), we get a palindrome (32055023).

The spelling of 20014021 in words is "twenty million, fourteen thousand, twenty-one".