20463515644 has 36 divisors (see below), whose sum is σ = 42390582472. Its totient is φ = 8586087840.

The previous prime is 20463515629. The next prime is 20463515647. The reversal of 20463515644 is 44651536402.

It is a junction number, because it is equal to n+sod(n) for n = 20463515597 and 20463515606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20463515647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1619862 + ... + 1632445.

Almost surely, 2^20463515644 is an apocalyptic number.

It is an amenable number.

20463515644 is an abundant number, since it is smaller than the sum of its proper divisors (21927066828).

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

20463515644 is a wasteful number, since it uses less digits than its factorization.

20463515644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3252346 (or 3252333 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 20463515644 in words is "twenty billion, four hundred sixty-three million, five hundred fifteen thousand, six hundred forty-four".