21754527530 has 16 divisors (see below), whose sum is σ = 41461570440. Its totient is φ = 8189939712.

The previous prime is 21754527523. The next prime is 21754527533. The reversal of 21754527530 is 3572545712.

21754527530 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 20011214521 + 1743313009 = 141461^2 + 41753^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21754527533) 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, 63983735 + ... + 63984074.

Almost surely, 2^21754527530 is an apocalyptic number.

21754527530 is a deficient number, since it is larger than the sum of its proper divisors (19707042910).

21754527530 is a wasteful number, since it uses less digits than its factorization.

21754527530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127967833.

The product of its (nonzero) digits is 294000, while the sum is 41.

The spelling of 21754527530 in words is "twenty-one billion, seven hundred fifty-four million, five hundred twenty-seven thousand, five hundred thirty".