20252124300421 has 4 divisors (see below), whose sum is σ = 21809980015852. Its totient is φ = 18694268584992.

The previous prime is 20252124300409. The next prime is 20252124300427. The reversal of 20252124300421 is 12400342125202.

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 3724533309025 + 16527590991396 = 1929905^2 + 4065414^2 .

It is not a de Polignac number, because 20252124300421 - 2¹⁹ = 20252123776133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20252124300421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20252124300427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778927857696 + ... + 778927857721.

It is an arithmetic number, because the mean of its divisors is an integer number (5452495003963).

Almost surely, 2^{20252124300421} is an apocalyptic number.

It is an amenable number.

20252124300421 is a deficient number, since it is larger than the sum of its proper divisors (1557855715431).

20252124300421 is a wasteful number, since it uses less digits than its factorization.

20252124300421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557855715430.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 20252124300421 its reverse (12400342125202), we get a palindrome (32652466425623).

The spelling of 20252124300421 in words is "twenty trillion, two hundred fifty-two billion, one hundred twenty-four million, three hundred thousand, four hundred twenty-one".