21115013467 has 2 divisors, whose sum is σ = 21115013468. Its totient is φ = 21115013466.

The previous prime is 21115013459. The next prime is 21115013483. The reversal of 21115013467 is 76431051112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21115013467 - 2³ = 21115013459 is a prime.

It is not a weakly prime, because it can be changed into another prime (21115013567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10557506733 + 10557506734.

It is an arithmetic number, because the mean of its divisors is an integer number (10557506734).

Almost surely, 2^21115013467 is an apocalyptic number.

21115013467 is a deficient number, since it is larger than the sum of its proper divisors (1).

21115013467 is an equidigital number, since it uses as much as digits as its factorization.

21115013467 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

Adding to 21115013467 its reverse (76431051112), we get a palindrome (97546064579).

The spelling of 21115013467 in words is "twenty-one billion, one hundred fifteen million, thirteen thousand, four hundred sixty-seven".