20144431020 has 96 divisors (see below), whose sum is σ = 65961358848. Its totient is φ = 4497357312.

The previous prime is 20144431003. The next prime is 20144431157. The reversal of 20144431020 is 2013444102.

It is a super-2 number, since 2×20144431020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 539649 + ... + 575768.

It is an arithmetic number, because the mean of its divisors is an integer number (687097488).

Almost surely, 2^20144431020 is an apocalyptic number.

20144431020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20144431020 is an abundant number, since it is smaller than the sum of its proper divisors (45816927828).

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

20144431020 is a wasteful number, since it uses less digits than its factorization.

20144431020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115479 (or 1115477 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20144431020 its reverse (2013444102), we get a palindrome (22157875122).

The spelling of 20144431020 in words is "twenty billion, one hundred forty-four million, four hundred thirty-one thousand, twenty".