21029595375073 has 2 divisors, whose sum is σ = 21029595375074. Its totient is φ = 21029595375072.

The previous prime is 21029595375059. The next prime is 21029595375083. The reversal of 21029595375073 is 37057359592012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20827969230289 + 201626144784 = 4563767^2 + 449028^2 .

It is a cyclic number.

It is not a de Polignac number, because 21029595375073 - 2²⁹ = 21029058504161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21029595374999 and 21029595375017.

It is not a weakly prime, because it can be changed into another prime (21029595375083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10514797687536 + 10514797687537.

It is an arithmetic number, because the mean of its divisors is an integer number (10514797687537).

Almost surely, 2^{21029595375073} is an apocalyptic number.

It is an amenable number.

21029595375073 is a deficient number, since it is larger than the sum of its proper divisors (1).

21029595375073 is an equidigital number, since it uses as much as digits as its factorization.

21029595375073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17860500, while the sum is 58.

The spelling of 21029595375073 in words is "twenty-one trillion, twenty-nine billion, five hundred ninety-five million, three hundred seventy-five thousand, seventy-three".