21106574530 has 8 divisors (see below), whose sum is σ = 37991834172. Its totient is φ = 8442629808.

The previous prime is 21106574501. The next prime is 21106574537. The reversal of 21106574530 is 3547560112.

It can be written as a sum of positive squares in 2 ways, for example, as 20622970449 + 483604081 = 143607^2 + 21991^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21106574537) 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, 1055328717 + ... + 1055328736.

Almost surely, 2^21106574530 is an apocalyptic number.

21106574530 is a deficient number, since it is larger than the sum of its proper divisors (16885259642).

21106574530 is a wasteful number, since it uses less digits than its factorization.

21106574530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110657460.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 21106574530 in words is "twenty-one billion, one hundred six million, five hundred seventy-four thousand, five hundred thirty".