21839012004 has 24 divisors (see below), whose sum is σ = 51655747360. Its totient is φ = 7179948864.

The previous prime is 21839011951. The next prime is 21839012087. The reversal of 21839012004 is 40021093812.

It is a super-4 number, since 4×21839012004⁴ (a number of 42 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12464314 + ... + 12466065.

Almost surely, 2^21839012004 is an apocalyptic number.

It is an amenable number.

21839012004 is an abundant number, since it is smaller than the sum of its proper divisors (29816735356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21839012004 is a wasteful number, since it uses less digits than its factorization.

21839012004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24930459 (or 24930457 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The spelling of 21839012004 in words is "twenty-one billion, eight hundred thirty-nine million, twelve thousand, four".