20306376247 has 2 divisors, whose sum is σ = 20306376248. Its totient is φ = 20306376246.

The previous prime is 20306376239. The next prime is 20306376253. The reversal of 20306376247 is 74267360302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20306376247 - 2³ = 20306376239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20306376227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10153188123 + 10153188124.

It is an arithmetic number, because the mean of its divisors is an integer number (10153188124).

Almost surely, 2^20306376247 is an apocalyptic number.

20306376247 is a deficient number, since it is larger than the sum of its proper divisors (1).

20306376247 is an equidigital number, since it uses as much as digits as its factorization.

20306376247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 40.

The spelling of 20306376247 in words is "twenty billion, three hundred six million, three hundred seventy-six thousand, two hundred forty-seven".