21486536434 has 16 divisors (see below), whose sum is σ = 35191136160. Its totient is φ = 9757899360.

The previous prime is 21486536429. The next prime is 21486536503. The reversal of 21486536434 is 43463568412.

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, 410139 + ... + 459550.

It is an arithmetic number, because the mean of its divisors is an integer number (2199446010).

Almost surely, 2^21486536434 is an apocalyptic number.

21486536434 is a deficient number, since it is larger than the sum of its proper divisors (13704599726).

21486536434 is a wasteful number, since it uses less digits than its factorization.

21486536434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870825.

The product of its digits is 1658880, while the sum is 46.

The spelling of 21486536434 in words is "twenty-one billion, four hundred eighty-six million, five hundred thirty-six thousand, four hundred thirty-four".