21754480036 has 27 divisors (see below), whose sum is σ = 39443889121. Its totient is φ = 10498032944.

The previous prime is 21754480021. The next prime is 21754480039. The reversal of 21754480036 is 63008445712.

The square root of 21754480036 is 147494.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11407521636 + 10346958400 = 106806^2 + 101720^2 .

It is a super-2 number, since 2×21754480036² (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 (21754480039) 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 8 ways as a sum of consecutive naturals, for example, 8553381 + ... + 8555923.

Almost surely, 2^21754480036 is an apocalyptic number.

21754480036 is the 147494-th square number.

It is an amenable number.

21754480036 is a deficient number, since it is larger than the sum of its proper divisors (17689409085).

21754480036 is an frugal number, since it uses more digits than its factorization.

21754480036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5148 (or 2574 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 21754480036 in words is "twenty-one billion, seven hundred fifty-four million, four hundred eighty thousand, thirty-six".