20557773236430 has 48 divisors (see below), whose sum is σ = 53481268464624. Its totient is φ = 5478887422080.

The previous prime is 20557773236423. The next prime is 20557773236443. The reversal of 20557773236430 is 3463237775502.

20557773236430 is a `hidden beast` number, since 2 + 0 + 5 + 577 + 7 + 3 + 2 + 3 + 64 + 3 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66207604 + ... + 66517383.

It is an arithmetic number, because the mean of its divisors is an integer number (1114193093013).

Almost surely, 2^{20557773236430} is an apocalyptic number.

20557773236430 is an abundant number, since it is smaller than the sum of its proper divisors (32923495228194).

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

20557773236430 is a wasteful number, since it uses less digits than its factorization.

20557773236430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132726721 (or 132726718 counting only the distinct ones).

The product of its (nonzero) digits is 22226400, while the sum is 54.

The spelling of 20557773236430 in words is "twenty trillion, five hundred fifty-seven billion, seven hundred seventy-three million, two hundred thirty-six thousand, four hundred thirty".