20154207163 has 2 divisors, whose sum is σ = 20154207164. Its totient is φ = 20154207162.

The previous prime is 20154207133. The next prime is 20154207277. The reversal of 20154207163 is 36170245102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20154207163 - 2¹³ = 20154198971 is a prime.

It is not a weakly prime, because it can be changed into another prime (20154207133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10077103581 + 10077103582.

It is an arithmetic number, because the mean of its divisors is an integer number (10077103582).

Almost surely, 2^20154207163 is an apocalyptic number.

20154207163 is a deficient number, since it is larger than the sum of its proper divisors (1).

20154207163 is an equidigital number, since it uses as much as digits as its factorization.

20154207163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 20154207163 in words is "twenty billion, one hundred fifty-four million, two hundred seven thousand, one hundred sixty-three".