21486036376488 has 32 divisors (see below), whose sum is σ = 53716794456960. Its totient is φ = 7161784990080.

The previous prime is 21486036376459. The next prime is 21486036376489. The reversal of 21486036376488 is 88467363068412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21486036376489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13422573 + ... + 14937788.

It is an arithmetic number, because the mean of its divisors is an integer number (1678649826780).

Almost surely, 2^{21486036376488} is an apocalyptic number.

It is an amenable number.

21486036376488 is an abundant number, since it is smaller than the sum of its proper divisors (32230758080472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21486036376488 is a wasteful number, since it uses less digits than its factorization.

21486036376488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28391937 (or 28391933 counting only the distinct ones).

The product of its (nonzero) digits is 222953472, while the sum is 66.

The spelling of 21486036376488 in words is "twenty-one trillion, four hundred eighty-six billion, thirty-six million, three hundred seventy-six thousand, four hundred eighty-eight".