20345020552442 has 4 divisors (see below), whose sum is σ = 30517530828666. Its totient is φ = 10172510276220.

The previous prime is 20345020552397. The next prime is 20345020552463. The reversal of 20345020552442 is 24425502054302.

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., 17253398145841 + 3091622406601 = 4153721^2 + 1758301^2 .

It is a super-2 number, since 2×20345020552442² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20345020552396 and 20345020552405.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5086255138109 + ... + 5086255138112.

Almost surely, 2^{20345020552442} is an apocalyptic number.

20345020552442 is a deficient number, since it is larger than the sum of its proper divisors (10172510276224).

20345020552442 is a wasteful number, since it uses less digits than its factorization.

20345020552442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10172510276223.

The product of its (nonzero) digits is 384000, while the sum is 38.

The spelling of 20345020552442 in words is "twenty trillion, three hundred forty-five billion, twenty million, five hundred fifty-two thousand, four hundred forty-two".