20887524844 has 24 divisors (see below), whose sum is σ = 39951854208. Its totient is φ = 9512344320.

The previous prime is 20887524803. The next prime is 20887524851. The reversal of 20887524844 is 44842578802.

It is a junction number, because it is equal to n+sod(n) for n = 20887524791 and 20887524800.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4952239 + ... + 4956454.

It is an arithmetic number, because the mean of its divisors is an integer number (1664660592).

Almost surely, 2^20887524844 is an apocalyptic number.

It is an amenable number.

20887524844 is a deficient number, since it is larger than the sum of its proper divisors (19064329364).

20887524844 is a wasteful number, since it uses less digits than its factorization.

20887524844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9908745 (or 9908743 counting only the distinct ones).

The product of its (nonzero) digits is 4587520, while the sum is 52.

The spelling of 20887524844 in words is "twenty billion, eight hundred eighty-seven million, five hundred twenty-four thousand, eight hundred forty-four".