21241562373 has 36 divisors (see below), whose sum is σ = 34287023628. Its totient is φ = 12626530560.

The previous prime is 21241562351. The next prime is 21241562387. The reversal of 21241562373 is 37326514212.

21241562373 is a `hidden beast` number, since 2 + 1 + 2 + 415 + 6 + 237 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15285118689 + 5956443684 = 123633^2 + 77178^2 .

It is not a de Polignac number, because 21241562373 - 2²⁴ = 21224785157 is a prime.

It is a super-2 number, since 2×21241562373² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241562273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 137058 + ... + 247523.

It is an arithmetic number, because the mean of its divisors is an integer number (952417323).

Almost surely, 2^21241562373 is an apocalyptic number.

It is an amenable number.

21241562373 is a deficient number, since it is larger than the sum of its proper divisors (13045461255).

21241562373 is a wasteful number, since it uses less digits than its factorization.

21241562373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384642 (or 384620 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The spelling of 21241562373 in words is "twenty-one billion, two hundred forty-one million, five hundred sixty-two thousand, three hundred seventy-three".