20021000010929 has 2 divisors, whose sum is σ = 20021000010930. Its totient is φ = 20021000010928.

The previous prime is 20021000010877. The next prime is 20021000011013. The reversal of 20021000010929 is 92901000012002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14792277521329 + 5228722489600 = 3846073^2 + 2286640^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021000010929 - 2¹⁶ = 20020999945393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20021000010898 and 20021000010907.

It is not a weakly prime, because it can be changed into another prime (20021000010229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010500005464 + 10010500005465.

It is an arithmetic number, because the mean of its divisors is an integer number (10010500005465).

Almost surely, 2^{20021000010929} is an apocalyptic number.

It is an amenable number.

20021000010929 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021000010929 is an equidigital number, since it uses as much as digits as its factorization.

20021000010929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 20021000010929 in words is "twenty trillion, twenty-one billion, ten thousand, nine hundred twenty-nine".