21468691428135 has 32 divisors (see below), whose sum is σ = 41566273155072. Its totient is φ = 9236949588480.

The previous prime is 21468691428091. The next prime is 21468691428161. The reversal of 21468691428135 is 53182419686412.

It is not a de Polignac number, because 21468691428135 - 2⁸ = 21468691427879 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6013637271 + ... + 6013640840.

It is an arithmetic number, because the mean of its divisors is an integer number (1298946036096).

Almost surely, 2^{21468691428135} is an apocalyptic number.

21468691428135 is a deficient number, since it is larger than the sum of its proper divisors (20097581726937).

21468691428135 is a wasteful number, since it uses less digits than its factorization.

21468691428135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12027278143.

The product of its digits is 19906560, while the sum is 60.

The spelling of 21468691428135 in words is "twenty-one trillion, four hundred sixty-eight billion, six hundred ninety-one million, four hundred twenty-eight thousand, one hundred thirty-five".