21146543456426 has 16 divisors (see below), whose sum is σ = 32490912297888. Its totient is φ = 10316745826800.

The previous prime is 21146543456369. The next prime is 21146543456443. The reversal of 21146543456426 is 62465434564112.

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, 126533405 + ... + 126700416.

It is an arithmetic number, because the mean of its divisors is an integer number (2030682018618).

Almost surely, 2^{21146543456426} is an apocalyptic number.

21146543456426 is a deficient number, since it is larger than the sum of its proper divisors (11344368841462).

21146543456426 is a wasteful number, since it uses less digits than its factorization.

21146543456426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253234837.

The product of its digits is 16588800, while the sum is 53.

The spelling of 21146543456426 in words is "twenty-one trillion, one hundred forty-six billion, five hundred forty-three million, four hundred fifty-six thousand, four hundred twenty-six".