20419825205 has 16 divisors (see below), whose sum is σ = 26395924464. Its totient is φ = 15075125760.

The previous prime is 20419825183. The next prime is 20419825241. The reversal of 20419825205 is 50252891402.

It can be written as a sum of positive squares in 8 ways, for example, as 1990676689 + 18429148516 = 44617^2 + 135754^2 .

It is not a de Polignac number, because 20419825205 - 2¹⁸ = 20419563061 is a prime.

It is a super-2 number, since 2×20419825205² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 207257 + ... + 289473.

It is an arithmetic number, because the mean of its divisors is an integer number (1649745279).

Almost surely, 2^20419825205 is an apocalyptic number.

It is an amenable number.

20419825205 is a deficient number, since it is larger than the sum of its proper divisors (5976099259).

20419825205 is a wasteful number, since it uses less digits than its factorization.

20419825205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86056.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 20419825205 in words is "twenty billion, four hundred nineteen million, eight hundred twenty-five thousand, two hundred five".