20014721 has 2 divisors, whose sum is σ = 20014722. Its totient is φ = 20014720.

The previous prime is 20014693. The next prime is 20014751. The reversal of 20014721 is 12741002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19044496 + 970225 = 4364^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 20014721 - 2¹⁴ = 19998337 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20014721.

It is not a weakly prime, because it can be changed into another prime (20014751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007360 + 10007361.

It is an arithmetic number, because the mean of its divisors is an integer number (10007361).

Almost surely, 2^20014721 is an apocalyptic number.

It is an amenable number.

20014721 is a deficient number, since it is larger than the sum of its proper divisors (1).

20014721 is an equidigital number, since it uses as much as digits as its factorization.

20014721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 20014721 is about 4473.7815100874. The cubic root of 20014721 is about 271.5083435625.

Adding to 20014721 its reverse (12741002), we get a palindrome (32755723).

The spelling of 20014721 in words is "twenty million, fourteen thousand, seven hundred twenty-one".