21164573026 has 8 divisors (see below), whose sum is σ = 31810482000. Its totient is φ = 10561079028.

The previous prime is 21164572997. The next prime is 21164573033. The reversal of 21164573026 is 62037546112.

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

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, 10602496 + ... + 10604491.

It is an arithmetic number, because the mean of its divisors is an integer number (3976310250).

Almost surely, 2^21164573026 is an apocalyptic number.

21164573026 is a deficient number, since it is larger than the sum of its proper divisors (10645908974).

21164573026 is a wasteful number, since it uses less digits than its factorization.

21164573026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21207488.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 21164573026 in words is "twenty-one billion, one hundred sixty-four million, five hundred seventy-three thousand, twenty-six".