21507526504103 has 2 divisors, whose sum is σ = 21507526504104. Its totient is φ = 21507526504102.

The previous prime is 21507526504049. The next prime is 21507526504111. The reversal of 21507526504103 is 30140562570512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21507526504103 - 2¹⁰ = 21507526503079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21507526504153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10753763252051 + 10753763252052.

It is an arithmetic number, because the mean of its divisors is an integer number (10753763252052).

Almost surely, 2^{21507526504103} is an apocalyptic number.

21507526504103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21507526504103 is an equidigital number, since it uses as much as digits as its factorization.

21507526504103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 21507526504103 in words is "twenty-one trillion, five hundred seven billion, five hundred twenty-six million, five hundred four thousand, one hundred three".