20245758554 has 24 divisors (see below), whose sum is σ = 35481087540. Its totient is φ = 8638854336.

The previous prime is 20245758523. The next prime is 20245758557. The reversal of 20245758554 is 45585754202.

It can be written as a sum of positive squares in 2 ways, for example, as 19984063225 + 261695329 = 141365^2 + 16177^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20245758499 and 20245758508.

It is not an unprimeable number, because it can be changed into a prime (20245758557) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 428627 + ... + 473510.

Almost surely, 2^20245758554 is an apocalyptic number.

20245758554 is a deficient number, since it is larger than the sum of its proper divisors (15235328986).

20245758554 is a wasteful number, since it uses less digits than its factorization.

20245758554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902382 (or 902375 counting only the distinct ones).

The product of its (nonzero) digits is 2240000, while the sum is 47.

The spelling of 20245758554 in words is "twenty billion, two hundred forty-five million, seven hundred fifty-eight thousand, five hundred fifty-four".