21467393069 has 2 divisors, whose sum is σ = 21467393070. Its totient is φ = 21467393068.

The previous prime is 21467393063. The next prime is 21467393071. The reversal of 21467393069 is 96039376412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11752728100 + 9714664969 = 108410^2 + 98563^2 .

It is a cyclic number.

It is not a de Polignac number, because 21467393069 - 2²⁸ = 21198957613 is a prime.

It is a super-2 number, since 2×21467393069² (a number of 21 digits) contains 22 as substring.

Together with 21467393071, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21467393063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10733696534 + 10733696535.

It is an arithmetic number, because the mean of its divisors is an integer number (10733696535).

Almost surely, 2^21467393069 is an apocalyptic number.

It is an amenable number.

21467393069 is a deficient number, since it is larger than the sum of its proper divisors (1).

21467393069 is an equidigital number, since it uses as much as digits as its factorization.

21467393069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 50.

The spelling of 21467393069 in words is "twenty-one billion, four hundred sixty-seven million, three hundred ninety-three thousand, sixty-nine".