20885023391724 has 18 divisors (see below), whose sum is σ = 52792698018060. Its totient is φ = 6961674463896.

The previous prime is 20885023391689. The next prime is 20885023391761. The reversal of 20885023391724 is 42719332058802.

20885023391724 is a `hidden beast` number, since 2 + 0 + 88 + 502 + 3 + 39 + 1 + 7 + 24 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 290069769294 + ... + 290069769365.

It is an arithmetic number, because the mean of its divisors is an integer number (2932927667670).

Almost surely, 2^{20885023391724} is an apocalyptic number.

It is an amenable number.

20885023391724 is an abundant number, since it is smaller than the sum of its proper divisors (31907674626336).

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

20885023391724 is a wasteful number, since it uses less digits than its factorization.

20885023391724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580139538669 (or 580139538664 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 20885023391724 in words is "twenty trillion, eight hundred eighty-five billion, twenty-three million, three hundred ninety-one thousand, seven hundred twenty-four".