20120332409 has 4 divisors (see below), whose sum is σ = 20121315060. Its totient is φ = 20119349760.

The previous prime is 20120332391. The next prime is 20120332429. The reversal of 20120332409 is 90423302102.

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 13468298809 + 6652033600 = 116053^2 + 81560^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120332409 - 2²⁴ = 20103555193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120332429) 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, 459944 + ... + 501785.

It is an arithmetic number, because the mean of its divisors is an integer number (5030328765).

Almost surely, 2^20120332409 is an apocalyptic number.

It is an amenable number.

20120332409 is a deficient number, since it is larger than the sum of its proper divisors (982651).

20120332409 is an equidigital number, since it uses as much as digits as its factorization.

20120332409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982650.

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 20120332409 in words is "twenty billion, one hundred twenty million, three hundred thirty-two thousand, four hundred nine".