20315443454066 has 4 divisors (see below), whose sum is σ = 30473165181102. Its totient is φ = 10157721727032.

The previous prime is 20315443454039. The next prime is 20315443454101. The reversal of 20315443454066 is 66045434451302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14579758539025 + 5735684915041 = 3818345^2 + 2394929^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20315443454066.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5078860863515 + ... + 5078860863518.

Almost surely, 2^{20315443454066} is an apocalyptic number.

20315443454066 is a deficient number, since it is larger than the sum of its proper divisors (10157721727036).

20315443454066 is a wasteful number, since it uses less digits than its factorization.

20315443454066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10157721727035.

The product of its (nonzero) digits is 4147200, while the sum is 47.

The spelling of 20315443454066 in words is "twenty trillion, three hundred fifteen billion, four hundred forty-three million, four hundred fifty-four thousand, sixty-six".