20545252254 has 48 divisors (see below), whose sum is σ = 47625798480. Its totient is φ = 6381607680.

The previous prime is 20545252229. The next prime is 20545252289. The reversal of 20545252254 is 45225254502.

20545252254 is a `hidden beast` number, since 20 + 545 + 25 + 22 + 54 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 471547 + ... + 513270.

It is an arithmetic number, because the mean of its divisors is an integer number (992204135).

Almost surely, 2^20545252254 is an apocalyptic number.

20545252254 is an abundant number, since it is smaller than the sum of its proper divisors (27080546226).

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

20545252254 is a wasteful number, since it uses less digits than its factorization.

20545252254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984905 (or 984902 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 36.

The spelling of 20545252254 in words is "twenty billion, five hundred forty-five million, two hundred fifty-two thousand, two hundred fifty-four".