21875736793 has 4 divisors (see below), whose sum is σ = 22826855808. Its totient is φ = 20924617780.

The previous prime is 21875736787. The next prime is 21875736853. The reversal of 21875736793 is 39763757812.

It is a happy number.

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 21875736793 - 2¹⁷ = 21875605721 is a prime.

It is a super-2 number, since 2×21875736793² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21875736733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475559473 + ... + 475559518.

It is an arithmetic number, because the mean of its divisors is an integer number (5706713952).

Almost surely, 2^21875736793 is an apocalyptic number.

21875736793 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21875736793 is a deficient number, since it is larger than the sum of its proper divisors (951119015).

21875736793 is an equidigital number, since it uses as much as digits as its factorization.

21875736793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951119014.

The product of its digits is 13335840, while the sum is 58.

The spelling of 21875736793 in words is "twenty-one billion, eight hundred seventy-five million, seven hundred thirty-six thousand, seven hundred ninety-three".