21048697404 has 36 divisors (see below), whose sum is σ = 60807348784. Its totient is φ = 6013913472.

The previous prime is 21048697403. The next prime is 21048697427. The reversal of 21048697404 is 40479684012.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 21048697404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21048697403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41763037 + ... + 41763540.

Almost surely, 2^21048697404 is an apocalyptic number.

It is an amenable number.

21048697404 is an abundant number, since it is smaller than the sum of its proper divisors (39758651380).

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

21048697404 is a wasteful number, since it uses less digits than its factorization.

21048697404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83526594 (or 83526589 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 21048697404 in words is "twenty-one billion, forty-eight million, six hundred ninety-seven thousand, four hundred four".