17220672487 has 2 divisors, whose sum is σ = 17220672488. Its totient is φ = 17220672486.

The previous prime is 17220672437. The next prime is 17220672533. The reversal of 17220672487 is 78427602271.

It is an a-pointer prime, because the next prime (17220672533) can be obtained adding 17220672487 to its sum of digits (46).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17220672487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17220672437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8610336243 + 8610336244.

It is an arithmetic number, because the mean of its divisors is an integer number (8610336244).

Almost surely, 2^17220672487 is an apocalyptic number.

17220672487 is a deficient number, since it is larger than the sum of its proper divisors (1).

17220672487 is an equidigital number, since it uses as much as digits as its factorization.

17220672487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 526848, while the sum is 46.

The spelling of 17220672487 in words is "seventeen billion, two hundred twenty million, six hundred seventy-two thousand, four hundred eighty-seven".