21830551053 has 4 divisors (see below), whose sum is σ = 29107401408. Its totient is φ = 14553700700.

The previous prime is 21830551051. The next prime is 21830551063. The reversal of 21830551053 is 35015503812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21830551053 - 2¹ = 21830551051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21830551051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3638425173 + ... + 3638425178.

It is an arithmetic number, because the mean of its divisors is an integer number (7276850352).

Almost surely, 2^21830551053 is an apocalyptic number.

It is an amenable number.

21830551053 is a deficient number, since it is larger than the sum of its proper divisors (7276850355).

21830551053 is an equidigital number, since it uses as much as digits as its factorization.

21830551053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7276850354.

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 21830551053 in words is "twenty-one billion, eight hundred thirty million, five hundred fifty-one thousand, fifty-three".