21852569058 has 16 divisors (see below), whose sum is σ = 43912274016. Its totient is φ = 7249667040.

The previous prime is 21852569041. The next prime is 21852569147. The reversal of 21852569058 is 85096525812.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 21852569058.

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, 8629291 + ... + 8631822.

It is an arithmetic number, because the mean of its divisors is an integer number (2744517126).

Almost surely, 2^21852569058 is an apocalyptic number.

21852569058 is an abundant number, since it is smaller than the sum of its proper divisors (22059704958).

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

21852569058 is a wasteful number, since it uses less digits than its factorization.

21852569058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17261329.

The product of its (nonzero) digits is 1728000, while the sum is 51.

The spelling of 21852569058 in words is "twenty-one billion, eight hundred fifty-two million, five hundred sixty-nine thousand, fifty-eight".