21023252454353 has 8 divisors (see below), whose sum is σ = 21194439821280. Its totient is φ = 20852227277440.

The previous prime is 21023252454317. The next prime is 21023252454371. The reversal of 21023252454353 is 35345425232012.

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 21023252454353 - 2⁶ = 21023252454289 is a prime.

It is a super-3 number, since 3×21023252454353³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21023252454353.

It is not an unprimeable number, because it can be changed into a prime (21023252454383) 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, 40287200 + ... + 40805697.

It is an arithmetic number, because the mean of its divisors is an integer number (2649304977660).

Almost surely, 2^{21023252454353} is an apocalyptic number.

It is an amenable number.

21023252454353 is a deficient number, since it is larger than the sum of its proper divisors (171187366927).

21023252454353 is a wasteful number, since it uses less digits than its factorization.

21023252454353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81095007.

The product of its (nonzero) digits is 864000, while the sum is 41.

Adding to 21023252454353 its reverse (35345425232012), we get a palindrome (56368677686365).

The spelling of 21023252454353 in words is "twenty-one trillion, twenty-three billion, two hundred fifty-two million, four hundred fifty-four thousand, three hundred fifty-three".