40403140021 has 8 divisors (see below), whose sum is σ = 40483922264. Its totient is φ = 40322396160.

The previous prime is 40403139961. The next prime is 40403140033. The reversal of 40403140021 is 12004130404.

It can be written as a sum of positive squares in 4 ways, for example, as 21801999025 + 18601140996 = 147655^2 + 136386^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40403140021 - 2⁹ = 40403139509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40403147021) 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, 3012751 + ... + 3026131.

It is an arithmetic number, because the mean of its divisors is an integer number (5060490283).

Almost surely, 2^40403140021 is an apocalyptic number.

It is an amenable number.

40403140021 is a deficient number, since it is larger than the sum of its proper divisors (80782243).

40403140021 is a wasteful number, since it uses less digits than its factorization.

40403140021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19191.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 40403140021 its reverse (12004130404), we get a palindrome (52407270425).

The spelling of 40403140021 in words is "forty billion, four hundred three million, one hundred forty thousand, twenty-one".