40003454021 has 8 divisors (see below), whose sum is σ = 42501340920. Its totient is φ = 37580131008.

The previous prime is 40003454009. The next prime is 40003454027. The reversal of 40003454021 is 12045430004.

It can be written as a sum of positive squares in 4 ways, for example, as 2304960100 + 37698493921 = 48010^2 + 194161^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40003454021 is a prime.

It is a super-2 number, since 2×40003454021² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40003454027) 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, 18639866 + ... + 18642011.

It is an arithmetic number, because the mean of its divisors is an integer number (5312667615).

Almost surely, 2^40003454021 is an apocalyptic number.

It is an amenable number.

40003454021 is a deficient number, since it is larger than the sum of its proper divisors (2497886899).

40003454021 is a wasteful number, since it uses less digits than its factorization.

40003454021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37281943.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 40003454021 its reverse (12045430004), we get a palindrome (52048884025).

The spelling of 40003454021 in words is "forty billion, three million, four hundred fifty-four thousand, twenty-one".