23453442420221 has 16 divisors (see below), whose sum is σ = 27751353815808. Its totient is φ = 19577674636800.

The previous prime is 23453442420127. The next prime is 23453442420271. The reversal of 23453442420221 is 12202424435432.

It is a cyclic number.

It is not a de Polignac number, because 23453442420221 - 2¹⁴ = 23453442403837 is a prime.

It is a super-2 number, since 2×23453442420221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23453442420271) 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, 1529498165 + ... + 1529513498.

It is an arithmetic number, because the mean of its divisors is an integer number (1734459613488).

Almost surely, 2^{23453442420221} is an apocalyptic number.

It is an amenable number.

23453442420221 is a deficient number, since it is larger than the sum of its proper divisors (4297911395587).

23453442420221 is a wasteful number, since it uses less digits than its factorization.

23453442420221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3059011732.

The product of its (nonzero) digits is 368640, while the sum is 38.

Adding to 23453442420221 its reverse (12202424435432), we get a palindrome (35655866855653).

The spelling of 23453442420221 in words is "twenty-three trillion, four hundred fifty-three billion, four hundred forty-two million, four hundred twenty thousand, two hundred twenty-one".