21751404313 has 8 divisors (see below), whose sum is σ = 22700196288. Its totient is φ = 20802868944.

The previous prime is 21751404287. The next prime is 21751404319. The reversal of 21751404313 is 31340415712.

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

It is a cyclic number.

It is not a de Polignac number, because 21751404313 - 2²⁹ = 21214533401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21751404319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120406 + ... + 240832.

It is an arithmetic number, because the mean of its divisors is an integer number (2837524536).

Almost surely, 2^21751404313 is an apocalyptic number.

21751404313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21751404313 is a deficient number, since it is larger than the sum of its proper divisors (948791975).

21751404313 is a wasteful number, since it uses less digits than its factorization.

21751404313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128303.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 21751404313 in words is "twenty-one billion, seven hundred fifty-one million, four hundred four thousand, three hundred thirteen".