21106026258 has 8 divisors (see below), whose sum is σ = 42212052528. Its totient is φ = 7035342084.

The previous prime is 21106026229. The next prime is 21106026299. The reversal of 21106026258 is 85262060112.

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

21106026258 is an admirable 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, 1758835516 + ... + 1758835527.

It is an arithmetic number, because the mean of its divisors is an integer number (5276506566).

Almost surely, 2^21106026258 is an apocalyptic number.

21106026258 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21106026258 is a wasteful number, since it uses less digits than its factorization.

21106026258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517671048.

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 21106026258 in words is "twenty-one billion, one hundred six million, twenty-six thousand, two hundred fifty-eight".