21514369049 has 2 divisors, whose sum is σ = 21514369050. Its totient is φ = 21514369048.

The previous prime is 21514369031. The next prime is 21514369061. The reversal of 21514369049 is 94096341512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12328105024 + 9186264025 = 111032^2 + 95845^2 .

It is a cyclic number.

It is not a de Polignac number, because 21514369049 - 2²⁴ = 21497591833 is a prime.

It is not a weakly prime, because it can be changed into another prime (21514369549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10757184524 + 10757184525.

It is an arithmetic number, because the mean of its divisors is an integer number (10757184525).

Almost surely, 2^21514369049 is an apocalyptic number.

It is an amenable number.

21514369049 is a deficient number, since it is larger than the sum of its proper divisors (1).

21514369049 is an equidigital number, since it uses as much as digits as its factorization.

21514369049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 21514369049 in words is "twenty-one billion, five hundred fourteen million, three hundred sixty-nine thousand, forty-nine".