21630002652553 has 8 divisors (see below), whose sum is σ = 22986866292480. Its totient is φ = 20282529072960.

The previous prime is 21630002652521. The next prime is 21630002652563. The reversal of 21630002652553 is 35525620003612.

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 21630002652553 - 2⁵ = 21630002652521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21630002652563) 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, 2347510333 + ... + 2347519546.

It is an arithmetic number, because the mean of its divisors is an integer number (2873358286560).

Almost surely, 2^{21630002652553} is an apocalyptic number.

It is an amenable number.

21630002652553 is a deficient number, since it is larger than the sum of its proper divisors (1356863639927).

21630002652553 is a wasteful number, since it uses less digits than its factorization.

21630002652553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4695030167.

The product of its (nonzero) digits is 324000, while the sum is 40.

The spelling of 21630002652553 in words is "twenty-one trillion, six hundred thirty billion, two million, six hundred fifty-two thousand, five hundred fifty-three".