20210399927 has 2 divisors, whose sum is σ = 20210399928. Its totient is φ = 20210399926.

The previous prime is 20210399887. The next prime is 20210399941. The reversal of 20210399927 is 72999301202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20210399927 - 2⁶ = 20210399863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210399227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105199963 + 10105199964.

It is an arithmetic number, because the mean of its divisors is an integer number (10105199964).

Almost surely, 2^20210399927 is an apocalyptic number.

20210399927 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210399927 is an equidigital number, since it uses as much as digits as its factorization.

20210399927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 44.

The spelling of 20210399927 in words is "twenty billion, two hundred ten million, three hundred ninety-nine thousand, nine hundred twenty-seven".