21004699046144 has 72 divisors (see below), whose sum is σ = 46099075427328. Its totient is φ = 9472412436480.

The previous prime is 21004699046137. The next prime is 21004699046251. The reversal of 21004699046144 is 44164099640012.

21004699046144 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 21004699046092 and 21004699046101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29008727 + ... + 29723990.

Almost surely, 2^{21004699046144} is an apocalyptic number.

It is an amenable number.

21004699046144 is an abundant number, since it is smaller than the sum of its proper divisors (25094376381184).

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

21004699046144 is a wasteful number, since it uses less digits than its factorization.

21004699046144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58732871 (or 58732857 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 21004699046144 in words is "twenty-one trillion, four billion, six hundred ninety-nine million, forty-six thousand, one hundred forty-four".