21752236753 has 8 divisors (see below), whose sum is σ = 23970265088. Its totient is φ = 19612034064.

The previous prime is 21752236691. The next prime is 21752236771. The reversal of 21752236753 is 35763225712.

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 21752236753 - 2¹⁷ = 21752105681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21752236783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19455825 + ... + 19456942.

It is an arithmetic number, because the mean of its divisors is an integer number (2996283136).

Almost surely, 2^21752236753 is an apocalyptic number.

It is an amenable number.

21752236753 is a deficient number, since it is larger than the sum of its proper divisors (2218028335).

21752236753 is a wasteful number, since it uses less digits than its factorization.

21752236753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38912823.

The product of its digits is 529200, while the sum is 43.

The spelling of 21752236753 in words is "twenty-one billion, seven hundred fifty-two million, two hundred thirty-six thousand, seven hundred fifty-three".