21297799545983 has 8 divisors (see below), whose sum is σ = 22583246045040. Its totient is φ = 20015979131520.

The previous prime is 21297799545959. The next prime is 21297799545991. The reversal of 21297799545983 is 38954599779212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21297799545983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21297799545898 and 21297799545907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21297799545283) 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, 906509048 + ... + 906532541.

It is an arithmetic number, because the mean of its divisors is an integer number (2822905755630).

Almost surely, 2^{21297799545983} is an apocalyptic number.

21297799545983 is a deficient number, since it is larger than the sum of its proper divisors (1285446499057).

21297799545983 is a wasteful number, since it uses less digits than its factorization.

21297799545983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813042297.

The product of its digits is 3086294400, while the sum is 80.

The spelling of 21297799545983 in words is "twenty-one trillion, two hundred ninety-seven billion, seven hundred ninety-nine million, five hundred forty-five thousand, nine hundred eighty-three".