21052012886 has 8 divisors (see below), whose sum is σ = 31579815384. Its totient is φ = 10525407760.

The previous prime is 21052012867. The next prime is 21052012909. The reversal of 21052012886 is 68821025012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent 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, 254015 + ... + 326538.

It is an arithmetic number, because the mean of its divisors is an integer number (3947476923).

Almost surely, 2^21052012886 is an apocalyptic number.

21052012886 is a deficient number, since it is larger than the sum of its proper divisors (10527802498).

21052012886 is a wasteful number, since it uses less digits than its factorization.

21052012886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598686.

The product of its (nonzero) digits is 15360, while the sum is 35.

Adding to 21052012886 its reverse (68821025012), we get a palindrome (89873037898).

The spelling of 21052012886 in words is "twenty-one billion, fifty-two million, twelve thousand, eight hundred eighty-six".