21122838858 has 32 divisors (see below), whose sum is σ = 46091977920. Its totient is φ = 6400056960.

The previous prime is 21122838833. The next prime is 21122838871. The reversal of 21122838858 is 85883822112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 708558 + ... + 737766.

It is an arithmetic number, because the mean of its divisors is an integer number (1440374310).

Almost surely, 2^21122838858 is an apocalyptic number.

21122838858 is an abundant number, since it is smaller than the sum of its proper divisors (24969139062).

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

21122838858 is a wasteful number, since it uses less digits than its factorization.

21122838858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40182.

The product of its digits is 491520, while the sum is 48.

The spelling of 21122838858 in words is "twenty-one billion, one hundred twenty-two million, eight hundred thirty-eight thousand, eight hundred fifty-eight".