20158911007 has 2 divisors, whose sum is σ = 20158911008. Its totient is φ = 20158911006.

The previous prime is 20158910987. The next prime is 20158911013. The reversal of 20158911007 is 70011985102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20158911007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20158917007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10079455503 + 10079455504.

It is an arithmetic number, because the mean of its divisors is an integer number (10079455504).

Almost surely, 2^20158911007 is an apocalyptic number.

20158911007 is a deficient number, since it is larger than the sum of its proper divisors (1).

20158911007 is an equidigital number, since it uses as much as digits as its factorization.

20158911007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 34.

The spelling of 20158911007 in words is "twenty billion, one hundred fifty-eight million, nine hundred eleven thousand, seven".