20120432011644 has 48 divisors (see below), whose sum is σ = 51012753505280. Its totient is φ = 6148858677120.

The previous prime is 20120432011567. The next prime is 20120432011651. The reversal of 20120432011644 is 44611023402102.

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, 1423339849 + ... + 1423353984.

Almost surely, 2^{20120432011644} is an apocalyptic number.

It is an amenable number.

20120432011644 is an abundant number, since it is smaller than the sum of its proper divisors (30892321493636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20120432011644 is a wasteful number, since it uses less digits than its factorization.

20120432011644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846693890 (or 2846693888 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 20120432011644 its reverse (44611023402102), we get a palindrome (64731455413746).

The spelling of 20120432011644 in words is "twenty trillion, one hundred twenty billion, four hundred thirty-two million, eleven thousand, six hundred forty-four".