42936670021 has 8 divisors (see below), whose sum is σ = 49275797760. Its totient is φ = 36648871728.

The previous prime is 42936669989. The next prime is 42936670027. The reversal of 42936670021 is 12007663924.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42936670021 - 2⁵ = 42936669989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42936670027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12830566 + ... + 12833911.

It is an arithmetic number, because the mean of its divisors is an integer number (6159474720).

Almost surely, 2^42936670021 is an apocalyptic number.

It is an amenable number.

42936670021 is a deficient number, since it is larger than the sum of its proper divisors (6339127739).

42936670021 is a wasteful number, since it uses less digits than its factorization.

42936670021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25664723.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 42936670021 in words is "forty-two billion, nine hundred thirty-six million, six hundred seventy thousand, twenty-one".