21152155162453 has 4 divisors (see below), whose sum is σ = 24173891614240. Its totient is φ = 18130418710668.

The previous prime is 21152155162447. The next prime is 21152155162469. The reversal of 21152155162453 is 35426155125112.

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 21152155162453 - 2¹³ = 21152155154261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152155162153) 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, 1510868225883 + ... + 1510868225896.

It is an arithmetic number, because the mean of its divisors is an integer number (6043472903560).

Almost surely, 2^{21152155162453} is an apocalyptic number.

It is an amenable number.

21152155162453 is a deficient number, since it is larger than the sum of its proper divisors (3021736451787).

21152155162453 is an equidigital number, since it uses as much as digits as its factorization.

21152155162453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3021736451786.

The product of its digits is 360000, while the sum is 43.

The spelling of 21152155162453 in words is "twenty-one trillion, one hundred fifty-two billion, one hundred fifty-five million, one hundred sixty-two thousand, four hundred fifty-three".