20557773236354 has 8 divisors (see below), whose sum is σ = 30836687576700. Its totient is φ = 10278877377456.

The previous prime is 20557773236333. The next prime is 20557773236359. The reversal of 20557773236354 is 45363237775502.

It can be written as a sum of positive squares in 2 ways, for example, as 17974928899225 + 2582844337129 = 4239685^2 + 1607123^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20557773236293 and 20557773236302.

It is not an unprimeable number, because it can be changed into a prime (20557773236359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1386929 + ... + 6560420.

Almost surely, 2^{20557773236354} is an apocalyptic number.

20557773236354 is a deficient number, since it is larger than the sum of its proper divisors (10278914340346).

20557773236354 is a wasteful number, since it uses less digits than its factorization.

20557773236354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9240724.

The product of its (nonzero) digits is 111132000, while the sum is 59.

The spelling of 20557773236354 in words is "twenty trillion, five hundred fifty-seven billion, seven hundred seventy-three million, two hundred thirty-six thousand, three hundred fifty-four".