40423343234021 has 32 divisors (see below), whose sum is σ = 45249228288000. Its totient is φ = 35803879384000.

The previous prime is 40423343234011. The next prime is 40423343234039. The reversal of 40423343234021 is 12043234332404.

40423343234021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 40423343234021 - 2³⁴ = 40406163364837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40423343234011) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 23625755 + ... + 25278903.

It is an arithmetic number, because the mean of its divisors is an integer number (1414038384000).

Almost surely, 2^{40423343234021} is an apocalyptic number.

It is an amenable number.

40423343234021 is a deficient number, since it is larger than the sum of its proper divisors (4825885053979).

40423343234021 is a wasteful number, since it uses less digits than its factorization.

40423343234021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653601.

The product of its (nonzero) digits is 165888, while the sum is 35.

Adding to 40423343234021 its reverse (12043234332404), we get a palindrome (52466577566425).

The spelling of 40423343234021 in words is "forty trillion, four hundred twenty-three billion, three hundred forty-three million, two hundred thirty-four thousand, twenty-one".