105420200045 has 4 divisors (see below), whose sum is σ = 126504240060. Its totient is φ = 84336160032.

The previous prime is 105420200033. The next prime is 105420200069. The reversal of 105420200045 is 540002024501.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34279041316 + 71141158729 = 185146^2 + 266723^2 .

It is a cyclic number.

It is not a de Polignac number, because 105420200045 - 2¹⁸ = 105419937901 is a prime.

It is a super-2 number, since 2×105420200045² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10542020000 + ... + 10542020009.

It is an arithmetic number, because the mean of its divisors is an integer number (31626060015).

Almost surely, 2^105420200045 is an apocalyptic number.

It is an amenable number.

105420200045 is a deficient number, since it is larger than the sum of its proper divisors (21084040015).

105420200045 is an equidigital number, since it uses as much as digits as its factorization.

105420200045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21084040014.

The product of its (nonzero) digits is 1600, while the sum is 23.

Adding to 105420200045 its reverse (540002024501), we get a palindrome (645422224546).

The spelling of 105420200045 in words is "one hundred five billion, four hundred twenty million, two hundred thousand, forty-five".