21862670069 has 2 divisors, whose sum is σ = 21862670070. Its totient is φ = 21862670068.

The previous prime is 21862670059. The next prime is 21862670107. The reversal of 21862670069 is 96007626812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21796979044 + 65691025 = 147638^2 + 8105^2 .

It is a cyclic number.

It is not a de Polignac number, because 21862670069 - 2⁸ = 21862669813 is a prime.

It is a super-2 number, since 2×21862670069² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21862670059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10931335034 + 10931335035.

It is an arithmetic number, because the mean of its divisors is an integer number (10931335035).

Almost surely, 2^21862670069 is an apocalyptic number.

It is an amenable number.

21862670069 is a deficient number, since it is larger than the sum of its proper divisors (1).

21862670069 is an equidigital number, since it uses as much as digits as its factorization.

21862670069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 21862670069 in words is "twenty-one billion, eight hundred sixty-two million, six hundred seventy thousand, sixty-nine".