21442023402353 has 4 divisors (see below), whose sum is σ = 21538175973888. Its totient is φ = 21345870830820.

The previous prime is 21442023402337. The next prime is 21442023402361. The reversal of 21442023402353 is 35320432024412.

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 21442023402353 - 2⁴ = 21442023402337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21442023402383) 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, 48076285433 + ... + 48076285878.

It is an arithmetic number, because the mean of its divisors is an integer number (5384543993472).

Almost surely, 2^{21442023402353} is an apocalyptic number.

It is an amenable number.

21442023402353 is a deficient number, since it is larger than the sum of its proper divisors (96152571535).

21442023402353 is an equidigital number, since it uses as much as digits as its factorization.

21442023402353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96152571534.

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 21442023402353 its reverse (35320432024412), we get a palindrome (56762455426765).

The spelling of 21442023402353 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred two thousand, three hundred fifty-three".