20373715577506 has 4 divisors (see below), whose sum is σ = 30560573366262. Its totient is φ = 10186857788752.

The previous prime is 20373715577491. The next prime is 20373715577507. The reversal of 20373715577506 is 60577551737302.

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., 18691000709481 + 1682714868025 = 4323309^2 + 1297195^2 .

It is a super-2 number, since 2×20373715577506² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20373715577507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5093428894375 + ... + 5093428894378.

Almost surely, 2^{20373715577506} is an apocalyptic number.

20373715577506 is a deficient number, since it is larger than the sum of its proper divisors (10186857788756).

20373715577506 is a wasteful number, since it uses less digits than its factorization.

20373715577506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10186857788755.

The product of its (nonzero) digits is 32413500, while the sum is 58.

The spelling of 20373715577506 in words is "twenty trillion, three hundred seventy-three billion, seven hundred fifteen million, five hundred seventy-seven thousand, five hundred six".