20840625873 has 24 divisors (see below), whose sum is σ = 32414148000. Its totient is φ = 12854830464.

The previous prime is 20840625823. The next prime is 20840625877. The reversal of 20840625873 is 37852604802.

20840625873 is a `hidden beast` number, since 2 + 0 + 8 + 4 + 0 + 62 + 587 + 3 = 666.

It is not a de Polignac number, because 20840625873 - 2¹² = 20840621777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20840625877) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1145323 + ... + 1163376.

It is an arithmetic number, because the mean of its divisors is an integer number (1350589500).

Almost surely, 2^20840625873 is an apocalyptic number.

It is an amenable number.

20840625873 is a deficient number, since it is larger than the sum of its proper divisors (11573522127).

20840625873 is a wasteful number, since it uses less digits than its factorization.

20840625873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308781 (or 2308778 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 20840625873 in words is "twenty billion, eight hundred forty million, six hundred twenty-five thousand, eight hundred seventy-three".