21467216206210 has 16 divisors (see below), whose sum is σ = 38641052596536. Its totient is φ = 8586872387968.

The previous prime is 21467216206157. The next prime is 21467216206231. The reversal of 21467216206210 is 1260261276412.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16444054986129 + 5023161220081 = 4055127^2 + 2241241^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6464022 + ... + 9204238.

Almost surely, 2^{21467216206210} is an apocalyptic number.

21467216206210 is a deficient number, since it is larger than the sum of its proper divisors (17173836390326).

21467216206210 is a wasteful number, since it uses less digits than its factorization.

21467216206210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523637.

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 21467216206210 in words is "twenty-one trillion, four hundred sixty-seven billion, two hundred sixteen million, two hundred six thousand, two hundred ten".