40702243021 has 4 divisors (see below), whose sum is σ = 44402446944. Its totient is φ = 37002039100.

The previous prime is 40702243019. The next prime is 40702243027. The reversal of 40702243021 is 12034220704.

It is a happy number.

40702243021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40702243021 - 2¹ = 40702243019 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 (40702243027) 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, 1850101945 + ... + 1850101966.

It is an arithmetic number, because the mean of its divisors is an integer number (11100611736).

Almost surely, 2^40702243021 is an apocalyptic number.

It is an amenable number.

40702243021 is a deficient number, since it is larger than the sum of its proper divisors (3700203923).

40702243021 is a wasteful number, since it uses less digits than its factorization.

40702243021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700203922.

The product of its (nonzero) digits is 2688, while the sum is 25.

Adding to 40702243021 its reverse (12034220704), we get a palindrome (52736463725).

The spelling of 40702243021 in words is "forty billion, seven hundred two million, two hundred forty-three thousand, twenty-one".