20005323356554 has 16 divisors (see below), whose sum is σ = 30874342083048. Its totient is φ = 9714846704832.

The previous prime is 20005323356521. The next prime is 20005323356639. The reversal of 20005323356554 is 45565332350002.

It can be written as a sum of positive squares in 4 ways, for example, as 11316004861329 + 8689318495225 = 3363927^2 + 2947765^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20005323356554.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242635809 + ... + 242718244.

Almost surely, 2^{20005323356554} is an apocalyptic number.

20005323356554 is a deficient number, since it is larger than the sum of its proper divisors (10869018726494).

20005323356554 is a wasteful number, since it uses less digits than its factorization.

20005323356554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485354649.

The product of its (nonzero) digits is 1620000, while the sum is 43.

The spelling of 20005323356554 in words is "twenty trillion, five billion, three hundred twenty-three million, three hundred fifty-six thousand, five hundred fifty-four".