40840223387021 has 4 divisors (see below), whose sum is σ = 40863926362272. Its totient is φ = 40816520411772.

The previous prime is 40840223386997. The next prime is 40840223387071. The reversal of 40840223387021 is 12078332204804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40840223387021 - 2⁶ = 40840223386957 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 (40840223387071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11851485041 + ... + 11851488486.

It is an arithmetic number, because the mean of its divisors is an integer number (10215981590568).

Almost surely, 2^{40840223387021} is an apocalyptic number.

It is an amenable number.

40840223387021 is a deficient number, since it is larger than the sum of its proper divisors (23702975251).

40840223387021 is a wasteful number, since it uses less digits than its factorization.

40840223387021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23702975250.

The product of its (nonzero) digits is 516096, while the sum is 44.

The spelling of 40840223387021 in words is "forty trillion, eight hundred forty billion, two hundred twenty-three million, three hundred eighty-seven thousand, twenty-one".