21027306097 has 16 divisors (see below), whose sum is σ = 24546436992. Its totient is φ = 17640754560.

The previous prime is 21027306067. The next prime is 21027306101. The reversal of 21027306097 is 79060372012.

It is a cyclic number.

It is not a de Polignac number, because 21027306097 - 2²³ = 21018917489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21027306007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90118 + ... + 223999.

It is an arithmetic number, because the mean of its divisors is an integer number (1534152312).

Almost surely, 2^21027306097 is an apocalyptic number.

It is an amenable number.

21027306097 is a deficient number, since it is larger than the sum of its proper divisors (3519130895).

21027306097 is a wasteful number, since it uses less digits than its factorization.

21027306097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314328.

The product of its (nonzero) digits is 31752, while the sum is 37.

The spelling of 21027306097 in words is "twenty-one billion, twenty-seven million, three hundred six thousand, ninety-seven".