20011103210929 has 2 divisors, whose sum is σ = 20011103210930. Its totient is φ = 20011103210928.

The previous prime is 20011103210909. The next prime is 20011103211061. The reversal of 20011103210929 is 92901230111002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17004860453025 + 3006242757904 = 4123695^2 + 1733852^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011103210929 - 2¹⁵ = 20011103178161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20011103210929.

It is not a weakly prime, because it can be changed into another prime (20011103210909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005551605464 + 10005551605465.

It is an arithmetic number, because the mean of its divisors is an integer number (10005551605465).

Almost surely, 2^{20011103210929} is an apocalyptic number.

It is an amenable number.

20011103210929 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011103210929 is an equidigital number, since it uses as much as digits as its factorization.

20011103210929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 20011103210929 in words is "twenty trillion, eleven billion, one hundred three million, two hundred ten thousand, nine hundred twenty-nine".