40006612021 has 16 divisors (see below), whose sum is σ = 42219711360. Its totient is φ = 37804415040.

The previous prime is 40006611991. The next prime is 40006612031. The reversal of 40006612021 is 12021660004.

It is a cyclic number.

It is not a de Polignac number, because 40006612021 - 2¹⁷ = 40006480949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40006611983 and 40006612001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40006612031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16801251 + ... + 16803631.

It is an arithmetic number, because the mean of its divisors is an integer number (2638731960).

Almost surely, 2^40006612021 is an apocalyptic number.

It is an amenable number.

40006612021 is a deficient number, since it is larger than the sum of its proper divisors (2213099339).

40006612021 is a wasteful number, since it uses less digits than its factorization.

40006612021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4284.

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 40006612021 in words is "forty billion, six million, six hundred twelve thousand, twenty-one".