21085068426 has 32 divisors (see below), whose sum is σ = 42368235840. Its totient is φ = 6995391744.

The previous prime is 21085068373. The next prime is 21085068449. The reversal of 21085068426 is 62486058012.

It is a super-2 number, since 2×21085068426² (a number of 21 digits) contains 22 as substring.

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, 1806706 + ... + 1818338.

It is an arithmetic number, because the mean of its divisors is an integer number (1324007370).

Almost surely, 2^21085068426 is an apocalyptic number.

21085068426 is an abundant number, since it is smaller than the sum of its proper divisors (21283167414).

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

21085068426 is a wasteful number, since it uses less digits than its factorization.

21085068426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13030.

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 21085068426 in words is "twenty-one billion, eighty-five million, sixty-eight thousand, four hundred twenty-six".