21162641142045 has 32 divisors (see below), whose sum is σ = 36568158584832. Its totient is φ = 10389016737792.

The previous prime is 21162641142029. The next prime is 21162641142061. The reversal of 21162641142045 is 54024114626112.

It is an interprime number because it is at equal distance from previous prime (21162641142029) and next prime (21162641142061).

It is not a de Polignac number, because 21162641142045 - 2⁴ = 21162641142029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 21162641141994 and 21162641142012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153651229 + ... + 153788898.

It is an arithmetic number, because the mean of its divisors is an integer number (1142754955776).

Almost surely, 2^{21162641142045} is an apocalyptic number.

It is an amenable number.

21162641142045 is a deficient number, since it is larger than the sum of its proper divisors (15405517442787).

21162641142045 is a wasteful number, since it uses less digits than its factorization.

21162641142045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307440501.

The product of its (nonzero) digits is 92160, while the sum is 39.

Adding to 21162641142045 its reverse (54024114626112), we get a palindrome (75186755768157).

The spelling of 21162641142045 in words is "twenty-one trillion, one hundred sixty-two billion, six hundred forty-one million, one hundred forty-two thousand, forty-five".