20457775006450 has 12 divisors (see below), whose sum is σ = 38051461512090. Its totient is φ = 8183110002560.

The previous prime is 20457775006439. The next prime is 20457775006483. The reversal of 20457775006450 is 5460057775402.

It can be written as a sum of positive squares in 3 ways, for example, as 20040475802281 + 417299204169 = 4476659^2 + 645987^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204577750015 + ... + 204577750114.

Almost surely, 2^{20457775006450} is an apocalyptic number.

20457775006450 is a deficient number, since it is larger than the sum of its proper divisors (17593686505640).

20457775006450 is a wasteful number, since it uses less digits than its factorization.

20457775006450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409155500141 (or 409155500136 counting only the distinct ones).

The product of its (nonzero) digits is 8232000, while the sum is 52.

The spelling of 20457775006450 in words is "twenty trillion, four hundred fifty-seven billion, seven hundred seventy-five million, six thousand, four hundred fifty".