20297228927 has 4 divisors (see below), whose sum is σ = 20297956056. Its totient is φ = 20296501800.

The previous prime is 20297228923. The next prime is 20297228929. The reversal of 20297228927 is 72982279202.

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 20297228927 - 2² = 20297228923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20297228921) 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, 319949 + ... + 378102.

It is an arithmetic number, because the mean of its divisors is an integer number (5074489014).

Almost surely, 2^20297228927 is an apocalyptic number.

20297228927 is a deficient number, since it is larger than the sum of its proper divisors (727129).

20297228927 is an equidigital number, since it uses as much as digits as its factorization.

20297228927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727128.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 20297228927 in words is "twenty billion, two hundred ninety-seven million, two hundred twenty-eight thousand, nine hundred twenty-seven".