21064530049 has 8 divisors (see below), whose sum is σ = 21292050560. Its totient is φ = 20838168000.

The previous prime is 21064530041. The next prime is 21064530089. The reversal of 21064530049 is 94003546012.

It is a happy number.

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 21064530049 - 2³ = 21064530041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21064529996 and 21064530023.

It is not an unprimeable number, because it can be changed into a prime (21064530041) 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, 253029 + ... + 325810.

It is an arithmetic number, because the mean of its divisors is an integer number (2661506320).

Almost surely, 2^21064530049 is an apocalyptic number.

It is an amenable number.

21064530049 is a deficient number, since it is larger than the sum of its proper divisors (227520511).

21064530049 is a wasteful number, since it uses less digits than its factorization.

21064530049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579231.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 21064530049 in words is "twenty-one billion, sixty-four million, five hundred thirty thousand, forty-nine".