20254515947 has 2 divisors, whose sum is σ = 20254515948. Its totient is φ = 20254515946.

The previous prime is 20254515937. The next prime is 20254515991. The reversal of 20254515947 is 74951545202.

It is an a-pointer prime, because the next prime (20254515991) can be obtained adding 20254515947 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20254515947 - 2¹⁰ = 20254514923 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20254515898 and 20254515907.

It is not a weakly prime, because it can be changed into another prime (20254515937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10127257973 + 10127257974.

It is an arithmetic number, because the mean of its divisors is an integer number (10127257974).

Almost surely, 2^20254515947 is an apocalyptic number.

20254515947 is a deficient number, since it is larger than the sum of its proper divisors (1).

20254515947 is an equidigital number, since it uses as much as digits as its factorization.

20254515947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504000, while the sum is 44.

The spelling of 20254515947 in words is "twenty billion, two hundred fifty-four million, five hundred fifteen thousand, nine hundred forty-seven".