20309529827 has 2 divisors, whose sum is σ = 20309529828. Its totient is φ = 20309529826.

The previous prime is 20309529769. The next prime is 20309529829. The reversal of 20309529827 is 72892590302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20309529827 - 2¹⁰ = 20309528803 is a prime.

Together with 20309529829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20309529829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10154764913 + 10154764914.

It is an arithmetic number, because the mean of its divisors is an integer number (10154764914).

Almost surely, 2^20309529827 is an apocalyptic number.

20309529827 is a deficient number, since it is larger than the sum of its proper divisors (1).

20309529827 is an equidigital number, since it uses as much as digits as its factorization.

20309529827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 20309529827 in words is "twenty billion, three hundred nine million, five hundred twenty-nine thousand, eight hundred twenty-seven".