21660535565230 has 32 divisors (see below), whose sum is σ = 39179745925056. Its totient is φ = 8621912991744.

The previous prime is 21660535565161. The next prime is 21660535565299. The reversal of 21660535565230 is 3256553506612.

It is an interprime number because it is at equal distance from previous prime (21660535565161) and next prime (21660535565299).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4092034 + ... + 7750213.

It is an arithmetic number, because the mean of its divisors is an integer number (1224367060158).

Almost surely, 2^{21660535565230} is an apocalyptic number.

21660535565230 is a deficient number, since it is larger than the sum of its proper divisors (17519210359826).

21660535565230 is a wasteful number, since it uses less digits than its factorization.

21660535565230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11843148.

The product of its (nonzero) digits is 4860000, while the sum is 49.

The spelling of 21660535565230 in words is "twenty-one trillion, six hundred sixty billion, five hundred thirty-five million, five hundred sixty-five thousand, two hundred thirty".