20463915644 has 24 divisors (see below), whose sum is σ = 36326900736. Its totient is φ = 10084886000.

The previous prime is 20463915607. The next prime is 20463915671. The reversal of 20463915644 is 44651936402.

It is a junction number, because it is equal to n+sod(n) for n = 20463915595 and 20463915604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1204529 + ... + 1221399.

It is an arithmetic number, because the mean of its divisors is an integer number (1513620864).

Almost surely, 2^20463915644 is an apocalyptic number.

It is an amenable number.

20463915644 is a deficient number, since it is larger than the sum of its proper divisors (15862985092).

20463915644 is a wasteful number, since it uses less digits than its factorization.

20463915644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21217 (or 21215 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 20463915644 in words is "twenty billion, four hundred sixty-three million, nine hundred fifteen thousand, six hundred forty-four".