21540024611 has 12 divisors (see below), whose sum is σ = 25254067968. Its totient is φ = 18317495952.

The previous prime is 21540024523. The next prime is 21540024691. The reversal of 21540024611 is 11642004512.

It is not a de Polignac number, because 21540024611 - 2¹⁴ = 21540008227 is a prime.

It is a super-3 number, since 3×21540024611³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21540024691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1724456 + ... + 1736901.

It is an arithmetic number, because the mean of its divisors is an integer number (2104505664).

Almost surely, 2^21540024611 is an apocalyptic number.

21540024611 is a deficient number, since it is larger than the sum of its proper divisors (3714043357).

21540024611 is a wasteful number, since it uses less digits than its factorization.

21540024611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461498 (or 3461491 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The spelling of 21540024611 in words is "twenty-one billion, five hundred forty million, twenty-four thousand, six hundred eleven".