21655043230652 has 48 divisors (see below), whose sum is σ = 43307631521280. Its totient is φ = 9398050588608.

The previous prime is 21655043230651. The next prime is 21655043230663. The reversal of 21655043230652 is 25603234055612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21655043230651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153372008 + ... + 153513135.

It is an arithmetic number, because the mean of its divisors is an integer number (902242323360).

Almost surely, 2^{21655043230652} is an apocalyptic number.

It is an amenable number.

21655043230652 is a deficient number, since it is larger than the sum of its proper divisors (21652588290628).

21655043230652 is a wasteful number, since it uses less digits than its factorization.

21655043230652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306885242 (or 306885240 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 21655043230652 in words is "twenty-one trillion, six hundred fifty-five billion, forty-three million, two hundred thirty thousand, six hundred fifty-two".