20372266405 has 32 divisors (see below), whose sum is σ = 26033464800. Its totient is φ = 15279194112.

The previous prime is 20372266379. The next prime is 20372266423. The reversal of 20372266405 is 50466227302.

It can be written as a sum of positive squares in 16 ways, for example, as 2718892449 + 17653373956 = 52143^2 + 132866^2 .

It is a cyclic number.

It is not a de Polignac number, because 20372266405 - 2¹¹ = 20372264357 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 731781 + ... + 759109.

It is an arithmetic number, because the mean of its divisors is an integer number (813545775).

Almost surely, 2^20372266405 is an apocalyptic number.

It is an amenable number.

20372266405 is a deficient number, since it is larger than the sum of its proper divisors (5661198395).

20372266405 is a wasteful number, since it uses less digits than its factorization.

20372266405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27513.

The product of its (nonzero) digits is 120960, while the sum is 37.

The spelling of 20372266405 in words is "twenty billion, three hundred seventy-two million, two hundred sixty-six thousand, four hundred five".