21839005706 has 24 divisors (see below), whose sum is σ = 38140961760. Its totient is φ = 9351192312.

The previous prime is 21839005691. The next prime is 21839005717. The reversal of 21839005706 is 60750093812.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10835 + ... + 209273.

It is an arithmetic number, because the mean of its divisors is an integer number (1589206740).

Almost surely, 2^21839005706 is an apocalyptic number.

21839005706 is a deficient number, since it is larger than the sum of its proper divisors (16301956054).

21839005706 is a wasteful number, since it uses less digits than its factorization.

21839005706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199578 (or 199571 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 21839005706 in words is "twenty-one billion, eight hundred thirty-nine million, five thousand, seven hundred six".