20970625547 has 2 divisors, whose sum is σ = 20970625548. Its totient is φ = 20970625546.

The previous prime is 20970625513. The next prime is 20970625579. The reversal of 20970625547 is 74552607902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20970625547 - 2¹⁰ = 20970624523 is a prime.

It is not a weakly prime, because it can be changed into another prime (20970325547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10485312773 + 10485312774.

It is an arithmetic number, because the mean of its divisors is an integer number (10485312774).

Almost surely, 2^20970625547 is an apocalyptic number.

20970625547 is a deficient number, since it is larger than the sum of its proper divisors (1).

20970625547 is an equidigital number, since it uses as much as digits as its factorization.

20970625547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 20970625547 in words is "twenty billion, nine hundred seventy million, six hundred twenty-five thousand, five hundred forty-seven".