21159475607 has 2 divisors, whose sum is σ = 21159475608. Its totient is φ = 21159475606.

The previous prime is 21159475591. The next prime is 21159475633. The reversal of 21159475607 is 70657495112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21159475607 - 2⁴ = 21159475591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21159475657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10579737803 + 10579737804.

It is an arithmetic number, because the mean of its divisors is an integer number (10579737804).

Almost surely, 2^21159475607 is an apocalyptic number.

21159475607 is a deficient number, since it is larger than the sum of its proper divisors (1).

21159475607 is an equidigital number, since it uses as much as digits as its factorization.

21159475607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 47.

The spelling of 21159475607 in words is "twenty-one billion, one hundred fifty-nine million, four hundred seventy-five thousand, six hundred seven".