21527423440037 has 16 divisors (see below), whose sum is σ = 21844119277872. Its totient is φ = 21212902195200.

The previous prime is 21527423440009. The next prime is 21527423440043. The reversal of 21527423440037 is 73004432472512.

It can be written as a sum of positive squares in 8 ways, for example, as 15710132887201 + 5817290552836 = 3963601^2 + 2411906^2 .

It is a cyclic number.

It is not a de Polignac number, because 21527423440037 - 2¹⁸ = 21527423177893 is a prime.

It is a super-2 number, since 2×21527423440037² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21527423440037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21527423440067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29568773 + ... + 30288069.

It is an arithmetic number, because the mean of its divisors is an integer number (1365257454867).

Almost surely, 2^{21527423440037} is an apocalyptic number.

It is an amenable number.

21527423440037 is a deficient number, since it is larger than the sum of its proper divisors (316695837835).

21527423440037 is a wasteful number, since it uses less digits than its factorization.

21527423440037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720808.

The product of its (nonzero) digits is 1128960, while the sum is 44.

The spelling of 21527423440037 in words is "twenty-one trillion, five hundred twenty-seven billion, four hundred twenty-three million, four hundred forty thousand, thirty-seven".