21098545427339 has 4 divisors (see below), whose sum is σ = 21098705156400. Its totient is φ = 21098385698280.

The previous prime is 21098545427303. The next prime is 21098545427353. The reversal of 21098545427339 is 93372454589012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21098545427339 - 2²⁰ = 21098544378763 is a prime.

It is a super-2 number, since 2×21098545427339² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21098545427639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79666232 + ... + 79930629.

It is an arithmetic number, because the mean of its divisors is an integer number (5274676289100).

Almost surely, 2^{21098545427339} is an apocalyptic number.

21098545427339 is a deficient number, since it is larger than the sum of its proper divisors (159729061).

21098545427339 is a wasteful number, since it uses less digits than its factorization.

21098545427339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159729060.

The product of its (nonzero) digits is 65318400, while the sum is 62.

The spelling of 21098545427339 in words is "twenty-one trillion, ninety-eight billion, five hundred forty-five million, four hundred twenty-seven thousand, three hundred thirty-nine".