20120432011645 has 16 divisors (see below), whose sum is σ = 27595238565888. Its totient is φ = 13796116047360.

The previous prime is 20120432011567. The next prime is 20120432011651. The reversal of 20120432011645 is 54611023402102.

It is not a de Polignac number, because 20120432011645 - 2⁷ = 20120432011517 is a prime.

It is a super-2 number, since 2×20120432011645² (a number of 27 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 15 ways as a sum of consecutive naturals, for example, 15006676 + ... + 16292365.

It is an arithmetic number, because the mean of its divisors is an integer number (1724702410368).

Almost surely, 2^{20120432011645} is an apocalyptic number.

It is an amenable number.

20120432011645 is a deficient number, since it is larger than the sum of its proper divisors (7474806554243).

20120432011645 is a wasteful number, since it uses less digits than its factorization.

20120432011645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31317420.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 20120432011645 its reverse (54611023402102), we get a palindrome (74731455413747).

The spelling of 20120432011645 in words is "twenty trillion, one hundred twenty billion, four hundred thirty-two million, eleven thousand, six hundred forty-five".