20921530196003 has 2 divisors, whose sum is σ = 20921530196004. Its totient is φ = 20921530196002.

The previous prime is 20921530195997. The next prime is 20921530196069. The reversal of 20921530196003 is 30069103512902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20921530196003 - 2⁶ = 20921530195939 is a prime.

It is not a weakly prime, because it can be changed into another prime (20921530196803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10460765098001 + 10460765098002.

It is an arithmetic number, because the mean of its divisors is an integer number (10460765098002).

Almost surely, 2^{20921530196003} is an apocalyptic number.

20921530196003 is a deficient number, since it is larger than the sum of its proper divisors (1).

20921530196003 is an equidigital number, since it uses as much as digits as its factorization.

20921530196003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 41.

The spelling of 20921530196003 in words is "twenty trillion, nine hundred twenty-one billion, five hundred thirty million, one hundred ninety-six thousand, three".