21590854471 has 24 divisors (see below), whose sum is σ = 23166318240. Its totient is φ = 20117494272.

The previous prime is 21590854433. The next prime is 21590854477. The reversal of 21590854471 is 17445809512.

It is not a de Polignac number, because 21590854471 - 2⁷ = 21590854343 is a prime.

It is a super-3 number, since 3×21590854471³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21590854477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13848390 + ... + 13849948.

It is an arithmetic number, because the mean of its divisors is an integer number (965263260).

Almost surely, 2^21590854471 is an apocalyptic number.

21590854471 is a deficient number, since it is larger than the sum of its proper divisors (1575463769).

21590854471 is a wasteful number, since it uses less digits than its factorization.

21590854471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043 (or 2026 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 21590854471 in words is "twenty-one billion, five hundred ninety million, eight hundred fifty-four thousand, four hundred seventy-one".