21856714032793 has 4 divisors (see below), whose sum is σ = 23007067402960. Its totient is φ = 20706360662628.

The previous prime is 21856714032781. The next prime is 21856714032799. The reversal of 21856714032793 is 39723041765812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21856714032793 - 2¹⁷ = 21856713901721 is a prime.

It is a super-2 number, since 2×21856714032793² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21856714032799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575176685055 + ... + 575176685092.

It is an arithmetic number, because the mean of its divisors is an integer number (5751766850740).

It is a 1-persistent number, because it is pandigital, but 2⋅21856714032793 = 43713428065586 is not.

Almost surely, 2^{21856714032793} is an apocalyptic number.

It is an amenable number.

21856714032793 is a deficient number, since it is larger than the sum of its proper divisors (1150353370167).

21856714032793 is a wasteful number, since it uses less digits than its factorization.

21856714032793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150353370166.

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 21856714032793 in words is "twenty-one trillion, eight hundred fifty-six billion, seven hundred fourteen million, thirty-two thousand, seven hundred ninety-three".