21876040839 has 16 divisors (see below), whose sum is σ = 29963030400. Its totient is φ = 14186714400.

The previous prime is 21876040829. The next prime is 21876040841. The reversal of 21876040839 is 93804067812.

It is not a de Polignac number, because 21876040839 - 2¹¹ = 21876038791 is a prime.

It is a super-2 number, since 2×21876040839² (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 (21876040829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 546664 + ... + 585314.

It is an arithmetic number, because the mean of its divisors is an integer number (1872689400).

Almost surely, 2^21876040839 is an apocalyptic number.

21876040839 is a deficient number, since it is larger than the sum of its proper divisors (8086989561).

21876040839 is a wasteful number, since it uses less digits than its factorization.

21876040839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43790.

The product of its (nonzero) digits is 580608, while the sum is 48.

It can be divided in two parts, 2187 and 6040839, that added together give a triangular number (6043026 = T₃₄₇₆).

The spelling of 21876040839 in words is "twenty-one billion, eight hundred seventy-six million, forty thousand, eight hundred thirty-nine".