21461395127632 has 40 divisors (see below), whose sum is σ = 43395305361984. Its totient is φ = 10262734884864.

The previous prime is 21461395127489. The next prime is 21461395127663. The reversal of 21461395127632 is 23672159316412.

It is a self number, because there is not a number n which added to its sum of digits gives 21461395127632.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1323633 + ... + 6683920.

Almost surely, 2^{21461395127632} is an apocalyptic number.

It is an amenable number.

21461395127632 is an abundant number, since it is smaller than the sum of its proper divisors (21933910234352).

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

21461395127632 is a wasteful number, since it uses less digits than its factorization.

21461395127632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8014867 (or 8014861 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 52.

The spelling of 21461395127632 in words is "twenty-one trillion, four hundred sixty-one billion, three hundred ninety-five million, one hundred twenty-seven thousand, six hundred thirty-two".