21839919008 has 24 divisors (see below), whose sum is σ = 44866791648. Its totient is φ = 10445178304.

The previous prime is 21839918981. The next prime is 21839919041. The reversal of 21839919008 is 80091993812.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14836166 + ... + 14837637.

It is an arithmetic number, because the mean of its divisors is an integer number (1869449652).

Almost surely, 2^21839919008 is an apocalyptic number.

It is an amenable number.

21839919008 is an abundant number, since it is smaller than the sum of its proper divisors (23026872640).

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

21839919008 is a wasteful number, since it uses less digits than its factorization.

21839919008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29673836 (or 29673828 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 50.

The spelling of 21839919008 in words is "twenty-one billion, eight hundred thirty-nine million, nine hundred nineteen thousand, eight".