20144023400 has 48 divisors (see below), whose sum is σ = 46912295040. Its totient is φ = 8044286400.

The previous prime is 20144023397. The next prime is 20144023409. The reversal of 20144023400 is 432044102.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (20144023409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38435 + ... + 204365.

It is an arithmetic number, because the mean of its divisors is an integer number (977339480).

Almost surely, 2^20144023400 is an apocalyptic number.

20144023400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20144023400 is an abundant number, since it is smaller than the sum of its proper divisors (26768271640).

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

20144023400 is a wasteful number, since it uses less digits than its factorization.

20144023400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166554 (or 166545 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20144023400 its reverse (432044102), we get a palindrome (20576067502).

The spelling of 20144023400 in words is "twenty billion, one hundred forty-four million, twenty-three thousand, four hundred".