39842021801 has 4 divisors (see below), whose sum is σ = 40146159504. Its totient is φ = 39537884100.

The previous prime is 39842021773. The next prime is 39842021851. The reversal of 39842021801 is 10812024893.

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 a de Polignac number, because none of the positive numbers 2^k-39842021801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39842021851) 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, 152068655 + ... + 152068916.

It is an arithmetic number, because the mean of its divisors is an integer number (10036539876).

Almost surely, 2^39842021801 is an apocalyptic number.

It is an amenable number.

39842021801 is a deficient number, since it is larger than the sum of its proper divisors (304137703).

39842021801 is a wasteful number, since it uses less digits than its factorization.

39842021801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304137702.

The product of its (nonzero) digits is 27648, while the sum is 38.

The spelling of 39842021801 in words is "thirty-nine billion, eight hundred forty-two million, twenty-one thousand, eight hundred one".