42220023977 has 2 divisors, whose sum is σ = 42220023978. Its totient is φ = 42220023976.

The previous prime is 42220023971. The next prime is 42220024019. The reversal of 42220023977 is 77932002224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28817099536 + 13402924441 = 169756^2 + 115771^2 .

It is a cyclic number.

It is not a de Polignac number, because 42220023977 - 2⁴ = 42220023961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42220023977.

It is not a weakly prime, because it can be changed into another prime (42220023971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21110011988 + 21110011989.

It is an arithmetic number, because the mean of its divisors is an integer number (21110011989).

Almost surely, 2^42220023977 is an apocalyptic number.

It is an amenable number.

42220023977 is a deficient number, since it is larger than the sum of its proper divisors (1).

42220023977 is an equidigital number, since it uses as much as digits as its factorization.

42220023977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 42220023977 in words is "forty-two billion, two hundred twenty million, twenty-three thousand, nine hundred seventy-seven".