21162456203613 has 4 divisors (see below), whose sum is σ = 28216608271488. Its totient is φ = 14108304135740.

The previous prime is 21162456203591. The next prime is 21162456203677. The reversal of 21162456203613 is 31630265426112.

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 21162456203613 - 2⁶ = 21162456203549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21162456283613) 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, 3527076033933 + ... + 3527076033938.

It is an arithmetic number, because the mean of its divisors is an integer number (7054152067872).

Almost surely, 2^{21162456203613} is an apocalyptic number.

It is an amenable number.

21162456203613 is a deficient number, since it is larger than the sum of its proper divisors (7054152067875).

21162456203613 is an equidigital number, since it uses as much as digits as its factorization.

21162456203613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7054152067874.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 21162456203613 in words is "twenty-one trillion, one hundred sixty-two billion, four hundred fifty-six million, two hundred three thousand, six hundred thirteen".