14521504021 has 2 divisors, whose sum is σ = 14521504022. Its totient is φ = 14521504020.

The previous prime is 14521503991. The next prime is 14521504087. The reversal of 14521504021 is 12040512541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13944303396 + 577200625 = 118086^2 + 24025^2 .

It is a cyclic number.

It is not a de Polignac number, because 14521504021 - 2¹⁷ = 14521372949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14521504121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7260752010 + 7260752011.

It is an arithmetic number, because the mean of its divisors is an integer number (7260752011).

Almost surely, 2^14521504021 is an apocalyptic number.

It is an amenable number.

14521504021 is a deficient number, since it is larger than the sum of its proper divisors (1).

14521504021 is an equidigital number, since it uses as much as digits as its factorization.

14521504021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 25.

The spelling of 14521504021 in words is "fourteen billion, five hundred twenty-one million, five hundred four thousand, twenty-one".