20197847567 has 2 divisors, whose sum is σ = 20197847568. Its totient is φ = 20197847566.

The previous prime is 20197847561. The next prime is 20197847573. The reversal of 20197847567 is 76574879102.

It is a balanced prime because it is at equal distance from previous prime (20197847561) and next prime (20197847573).

It is a cyclic number.

It is not a de Polignac number, because 20197847567 - 2¹⁸ = 20197585423 is a prime.

It is a super-3 number, since 3×20197847567³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20197847561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10098923783 + 10098923784.

It is an arithmetic number, because the mean of its divisors is an integer number (10098923784).

Almost surely, 2^20197847567 is an apocalyptic number.

20197847567 is a deficient number, since it is larger than the sum of its proper divisors (1).

20197847567 is an equidigital number, since it uses as much as digits as its factorization.

20197847567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5927040, while the sum is 56.

The spelling of 20197847567 in words is "twenty billion, one hundred ninety-seven million, eight hundred forty-seven thousand, five hundred sixty-seven".