40530354021 has 20 divisors (see below), whose sum is σ = 60553648012. Its totient is φ = 27016530048.

The previous prime is 40530353989. The next prime is 40530354043. The reversal of 40530354021 is 12045303504.

40530354021 is a `hidden beast` number, since 40 + 530 + 35 + 40 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6207233796 + 34323120225 = 78786^2 + 185265^2 .

It is not a de Polignac number, because 40530354021 - 2⁵ = 40530353989 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40530304021) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 641565 + ... + 701901.

Almost surely, 2^40530354021 is an apocalyptic number.

It is an amenable number.

40530354021 is a deficient number, since it is larger than the sum of its proper divisors (20023293991).

40530354021 is an equidigital number, since it uses as much as digits as its factorization.

40530354021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68642 (or 68633 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 40530354021 its reverse (12045303504), we get a palindrome (52575657525).

The spelling of 40530354021 in words is "forty billion, five hundred thirty million, three hundred fifty-four thousand, twenty-one".