21583874330357 has 32 divisors (see below), whose sum is σ = 23640832212480. Its totient is φ = 19658990471680.

The previous prime is 21583874330351. The next prime is 21583874330377. The reversal of 21583874330357 is 75303347838512.

It is a de Polignac number, because none of the positive numbers 2^k-21583874330357 is a prime.

It is a super-2 number, since 2×21583874330357² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21583874330296 and 21583874330305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21583874330351) 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 31 ways as a sum of consecutive naturals, for example, 2311583 + ... + 6964995.

It is an arithmetic number, because the mean of its divisors is an integer number (738776006640).

Almost surely, 2^{21583874330357} is an apocalyptic number.

It is an amenable number.

21583874330357 is a deficient number, since it is larger than the sum of its proper divisors (2056957882123).

21583874330357 is a wasteful number, since it uses less digits than its factorization.

21583874330357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4653613.

The product of its (nonzero) digits is 50803200, while the sum is 59.

The spelling of 21583874330357 in words is "twenty-one trillion, five hundred eighty-three billion, eight hundred seventy-four million, three hundred thirty thousand, three hundred fifty-seven".