21030230269 has 2 divisors, whose sum is σ = 21030230270. Its totient is φ = 21030230268.

The previous prime is 21030230257. The next prime is 21030230357. The reversal of 21030230269 is 96203203012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13779707769 + 7250522500 = 117387^2 + 85150^2 .

It is a cyclic number.

It is not a de Polignac number, because 21030230269 - 2⁷ = 21030230141 is a prime.

It is a super-2 number, since 2×21030230269² (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 (21030231269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515115134 + 10515115135.

It is an arithmetic number, because the mean of its divisors is an integer number (10515115135).

Almost surely, 2^21030230269 is an apocalyptic number.

It is an amenable number.

21030230269 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030230269 is an equidigital number, since it uses as much as digits as its factorization.

21030230269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 21030230269 in words is "twenty-one billion, thirty million, two hundred thirty thousand, two hundred sixty-nine".