22505494587 has 16 divisors (see below), whose sum is σ = 30648925440. Its totient is φ = 14685904800.

The previous prime is 22505494577. The next prime is 22505494589. The reversal of 22505494587 is 78549450522.

It is not a de Polignac number, because 22505494587 - 2⁸ = 22505494331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22505494589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350464 + ... + 409677.

It is an arithmetic number, because the mean of its divisors is an integer number (1915557840).

Almost surely, 2^22505494587 is an apocalyptic number.

22505494587 is a deficient number, since it is larger than the sum of its proper divisors (8143430853).

22505494587 is a wasteful number, since it uses less digits than its factorization.

22505494587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760354.

The product of its (nonzero) digits is 4032000, while the sum is 51.

The spelling of 22505494587 in words is "twenty-two billion, five hundred five million, four hundred ninety-four thousand, five hundred eighty-seven".