21250236515603 has 2 divisors, whose sum is σ = 21250236515604. Its totient is φ = 21250236515602.

The previous prime is 21250236515467. The next prime is 21250236515701. The reversal of 21250236515603 is 30651563205212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21250236515603 - 2⁴² = 16852190004499 is a prime.

It is not a weakly prime, because it can be changed into another prime (21250226515603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10625118257801 + 10625118257802.

It is an arithmetic number, because the mean of its divisors is an integer number (10625118257802).

Almost surely, 2^{21250236515603} is an apocalyptic number.

21250236515603 is a deficient number, since it is larger than the sum of its proper divisors (1).

21250236515603 is an equidigital number, since it uses as much as digits as its factorization.

21250236515603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 21250236515603 in words is "twenty-one trillion, two hundred fifty billion, two hundred thirty-six million, five hundred fifteen thousand, six hundred three".