20151905029 has 2 divisors, whose sum is σ = 20151905030. Its totient is φ = 20151905028.

The previous prime is 20151905023. The next prime is 20151905047. The reversal of 20151905029 is 92050915102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11070196225 + 9081708804 = 105215^2 + 95298^2 .

It is a cyclic number.

It is not a de Polignac number, because 20151905029 - 2⁹ = 20151904517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20151904985 and 20151905003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20151905023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10075952514 + 10075952515.

It is an arithmetic number, because the mean of its divisors is an integer number (10075952515).

Almost surely, 2^20151905029 is an apocalyptic number.

It is an amenable number.

20151905029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20151905029 is an equidigital number, since it uses as much as digits as its factorization.

20151905029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 34.

The spelling of 20151905029 in words is "twenty billion, one hundred fifty-one million, nine hundred five thousand, twenty-nine".