40143450420 has 192 divisors, whose sum is σ = 132137913600. Its totient is φ = 10089515520.

The previous prime is 40143450397. The next prime is 40143450437. The reversal of 40143450420 is 2405434104.

It is a happy number.

It is a super-2 number, since 2×40143450420² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 2011290 + ... + 2031150.

It is an arithmetic number, because the mean of its divisors is an integer number (688218300).

Almost surely, 2^40143450420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40143450420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66068956800).

40143450420 is an abundant number, since it is smaller than the sum of its proper divisors (91994463180).

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

40143450420 is a wasteful number, since it uses less digits than its factorization.

40143450420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20095 (or 20087 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 40143450420 its reverse (2405434104), we get a palindrome (42548884524).

The spelling of 40143450420 in words is "forty billion, one hundred forty-three million, four hundred fifty thousand, four hundred twenty".