40164321020 has 24 divisors (see below), whose sum is σ = 84348898368. Its totient is φ = 16065000000.

The previous prime is 40164320971. The next prime is 40164321037. The reversal of 40164321020 is 2012346104.

It is a super-2 number, since 2×40164321020² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723245 + ... + 776795.

It is an arithmetic number, because the mean of its divisors is an integer number (3514537432).

Almost surely, 2^40164321020 is an apocalyptic number.

It is an amenable number.

40164321020 is an abundant number, since it is smaller than the sum of its proper divisors (44184577348).

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

40164321020 is a wasteful number, since it uses less digits than its factorization.

40164321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91061 (or 91059 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 40164321020 its reverse (2012346104), we get a palindrome (42176667124).

The spelling of 40164321020 in words is "forty billion, one hundred sixty-four million, three hundred twenty-one thousand, twenty".