21485118078067 has 32 divisors (see below), whose sum is σ = 25656246374400. Its totient is φ = 17602252080000.

The previous prime is 21485118078049. The next prime is 21485118078071. The reversal of 21485118078067 is 76087081158412.

It is a de Polignac number, because none of the positive numbers 2^k-21485118078067 is a prime.

It is a super-2 number, since 2×21485118078067² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21485118076067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152697534 + ... + 152838172.

It is an arithmetic number, because the mean of its divisors is an integer number (801757699200).

Almost surely, 2^{21485118078067} is an apocalyptic number.

21485118078067 is a deficient number, since it is larger than the sum of its proper divisors (4171128296333).

21485118078067 is a wasteful number, since it uses less digits than its factorization.

21485118078067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148227.

The product of its (nonzero) digits is 6021120, while the sum is 58.

The spelling of 21485118078067 in words is "twenty-one trillion, four hundred eighty-five billion, one hundred eighteen million, seventy-eight thousand, sixty-seven".