21714305652621 has 24 divisors (see below), whose sum is σ = 33583261902840. Its totient is φ = 13471576267776.

The previous prime is 21714305652583. The next prime is 21714305652623. The reversal of 21714305652621 is 12625650341712.

21714305652621 is a `hidden beast` number, since 2 + 1 + 7 + 1 + 43 + 0 + 565 + 26 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3332592640521 + 18381713012100 = 1825539^2 + 4287390^2 .

It is not a de Polignac number, because 21714305652621 - 2¹³ = 21714305644429 is a prime.

It is a super-2 number, since 2×21714305652621² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21714305652623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 797309790 + ... + 797337023.

It is an arithmetic number, because the mean of its divisors is an integer number (1399302579285).

Almost surely, 2^{21714305652621} is an apocalyptic number.

It is an amenable number.

21714305652621 is a deficient number, since it is larger than the sum of its proper divisors (11868956250219).

21714305652621 is a wasteful number, since it uses less digits than its factorization.

21714305652621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594646925 (or 1594646922 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 21714305652621 in words is "twenty-one trillion, seven hundred fourteen billion, three hundred five million, six hundred fifty-two thousand, six hundred twenty-one".