14811821 has 2 divisors, whose sum is σ = 14811822. Its totient is φ = 14811820.

The previous prime is 14811809. The next prime is 14811847. The reversal of 14811821 is 12811841.

It is an a-pointer prime, because the next prime (14811847) can be obtained adding 14811821 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14546596 + 265225 = 3814^2 + 515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14811821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14811871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7405910 + 7405911.

It is an arithmetic number, because the mean of its divisors is an integer number (7405911).

Almost surely, 2^14811821 is an apocalyptic number.

It is an amenable number.

14811821 is a deficient number, since it is larger than the sum of its proper divisors (1).

14811821 is an equidigital number, since it uses as much as digits as its factorization.

14811821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 26.

The square root of 14811821 is about 3848.6128669951. The cubic root of 14811821 is about 245.5855548327.

The spelling of 14811821 in words is "fourteen million, eight hundred eleven thousand, eight hundred twenty-one".