21714544521 has 12 divisors (see below), whose sum is σ = 31367896560. Its totient is φ = 14475235320.

The previous prime is 21714544519. The next prime is 21714544531. The reversal of 21714544521 is 12544541712.

21714544521 is a `hidden beast` number, since 2 + 171 + 45 + 445 + 2 + 1 = 666.

It is not a de Polignac number, because 21714544521 - 2¹ = 21714544519 is a prime.

It is a super-2 number, since 2×21714544521² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21714544531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37686 + ... + 211776.

It is an arithmetic number, because the mean of its divisors is an integer number (2613991380).

Almost surely, 2^21714544521 is an apocalyptic number.

It is an amenable number.

21714544521 is a deficient number, since it is larger than the sum of its proper divisors (9653352039).

21714544521 is a wasteful number, since it uses less digits than its factorization.

21714544521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187956 (or 187953 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The spelling of 21714544521 in words is "twenty-one billion, seven hundred fourteen million, five hundred forty-four thousand, five hundred twenty-one".