21650552053 has 8 divisors (see below), whose sum is σ = 23390954496. Its totient is φ = 19920860400.

The previous prime is 21650552051. The next prime is 21650552057. The reversal of 21650552053 is 35025505612.

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 21650552053 - 2¹ = 21650552051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21650552051) 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, 2673493 + ... + 2681578.

It is an arithmetic number, because the mean of its divisors is an integer number (2923869312).

Almost surely, 2^21650552053 is an apocalyptic number.

It is an amenable number.

21650552053 is a deficient number, since it is larger than the sum of its proper divisors (1740402443).

21650552053 is a wasteful number, since it uses less digits than its factorization.

21650552053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5355395.

The product of its (nonzero) digits is 45000, while the sum is 34.

The spelling of 21650552053 in words is "twenty-one billion, six hundred fifty million, five hundred fifty-two thousand, fifty-three".