21000527579 has 2 divisors, whose sum is σ = 21000527580. Its totient is φ = 21000527578.

The previous prime is 21000527531. The next prime is 21000527621. The reversal of 21000527579 is 97572500012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21000527579 - 2²⁸ = 20732092123 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000527519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500263789 + 10500263790.

It is an arithmetic number, because the mean of its divisors is an integer number (10500263790).

Almost surely, 2^21000527579 is an apocalyptic number.

21000527579 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000527579 is an equidigital number, since it uses as much as digits as its factorization.

21000527579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 38.

The spelling of 21000527579 in words is "twenty-one billion, five hundred twenty-seven thousand, five hundred seventy-nine".