21045013147 has 2 divisors, whose sum is σ = 21045013148. Its totient is φ = 21045013146.

The previous prime is 21045013141. The next prime is 21045013159. The reversal of 21045013147 is 74131054012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21045013147 is a prime.

It is not a weakly prime, because it can be changed into another prime (21045013141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10522506573 + 10522506574.

It is an arithmetic number, because the mean of its divisors is an integer number (10522506574).

Almost surely, 2^21045013147 is an apocalyptic number.

21045013147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21045013147 is an equidigital number, since it uses as much as digits as its factorization.

21045013147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 21045013147 its reverse (74131054012), we get a palindrome (95176067159).

The spelling of 21045013147 in words is "twenty-one billion, forty-five million, thirteen thousand, one hundred forty-seven".