21352144053 has 8 divisors (see below), whose sum is σ = 28582950816. Its totient is φ = 14178050000.

The previous prime is 21352144003. The next prime is 21352144111. The reversal of 21352144053 is 35044125312.

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 21352144053 - 2⁸ = 21352143797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21352144053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352144003) 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, 14177298 + ... + 14178803.

It is an arithmetic number, because the mean of its divisors is an integer number (3572868852).

Almost surely, 2^21352144053 is an apocalyptic number.

It is an amenable number.

21352144053 is a deficient number, since it is larger than the sum of its proper divisors (7230806763).

21352144053 is a wasteful number, since it uses less digits than its factorization.

21352144053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28356355.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 21352144053 its reverse (35044125312), we get a palindrome (56396269365).

The spelling of 21352144053 in words is "twenty-one billion, three hundred fifty-two million, one hundred forty-four thousand, fifty-three".