21563070027205 has 16 divisors (see below), whose sum is σ = 29575392971904. Its totient is φ = 14784513837120.

The previous prime is 21563070027173. The next prime is 21563070027251. The reversal of 21563070027205 is 50272007036512.

It is not a de Polignac number, because 21563070027205 - 2⁵ = 21563070027173 is a prime.

It is a super-2 number, since 2×21563070027205² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32822691 + ... + 33473200.

It is an arithmetic number, because the mean of its divisors is an integer number (1848462060744).

Almost surely, 2^{21563070027205} is an apocalyptic number.

It is an amenable number.

21563070027205 is a deficient number, since it is larger than the sum of its proper divisors (8012322944699).

21563070027205 is an equidigital number, since it uses as much as digits as its factorization.

21563070027205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66305196.

The product of its (nonzero) digits is 176400, while the sum is 40.

The spelling of 21563070027205 in words is "twenty-one trillion, five hundred sixty-three billion, seventy million, twenty-seven thousand, two hundred five".