21113023985 has 8 divisors (see below), whose sum is σ = 25692469056. Its totient is φ = 16652525680.

The previous prime is 21113023969. The next prime is 21113023993. The reversal of 21113023985 is 58932031112.

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

It is not a de Polignac number, because 21113023985 - 2⁴ = 21113023969 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 29736299 + ... + 29737008.

It is an arithmetic number, because the mean of its divisors is an integer number (3211558632).

Almost surely, 2^21113023985 is an apocalyptic number.

It is an amenable number.

21113023985 is a deficient number, since it is larger than the sum of its proper divisors (4579445071).

21113023985 is an equidigital number, since it uses as much as digits as its factorization.

21113023985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59473383.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 21113023985 in words is "twenty-one billion, one hundred thirteen million, twenty-three thousand, nine hundred eighty-five".