21004314467 has 2 divisors, whose sum is σ = 21004314468. Its totient is φ = 21004314466.

The previous prime is 21004314347. The next prime is 21004314491. The reversal of 21004314467 is 76441340012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21004314467 - 2¹⁸ = 21004052323 is a prime.

It is not a weakly prime, because it can be changed into another prime (21004316467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10502157233 + 10502157234.

It is an arithmetic number, because the mean of its divisors is an integer number (10502157234).

Almost surely, 2^21004314467 is an apocalyptic number.

21004314467 is a deficient number, since it is larger than the sum of its proper divisors (1).

21004314467 is an equidigital number, since it uses as much as digits as its factorization.

21004314467 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

Adding to 21004314467 its reverse (76441340012), we get a palindrome (97445654479).

The spelling of 21004314467 in words is "twenty-one billion, four million, three hundred fourteen thousand, four hundred sixty-seven".