20432432144 has 40 divisors (see below), whose sum is σ = 40277124480. Its totient is φ = 10038672000.

The previous prime is 20432432129. The next prime is 20432432147. The reversal of 20432432144 is 44123423402.

It is not an unprimeable number, because it can be changed into a prime (20432432147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1015817 + ... + 1035735.

It is an arithmetic number, because the mean of its divisors is an integer number (1006928112).

Almost surely, 2^20432432144 is an apocalyptic number.

It is an amenable number.

20432432144 is a deficient number, since it is larger than the sum of its proper divisors (19844692336).

20432432144 is a wasteful number, since it uses less digits than its factorization.

20432432144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21039 (or 21033 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 20432432144 its reverse (44123423402), we get a palindrome (64555855546).

The spelling of 20432432144 in words is "twenty billion, four hundred thirty-two million, four hundred thirty-two thousand, one hundred forty-four".