39952020238418 has 18 divisors (see below), whose sum is σ = 63660814180911. Its totient is φ = 18800879189184.

The previous prime is 39952020238373. The next prime is 39952020238457. The reversal of 39952020238418 is 81483202025993.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 39641038908769 + 310981329649 = 6296113^2 + 557657^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=4469453.

It is a super-2 number, since 2×39952020238418² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 151829948 + ... + 152092856.

Almost surely, 2^{39952020238418} is an apocalyptic number.

39952020238418 is a deficient number, since it is larger than the sum of its proper divisors (23708793942493).

39952020238418 is an frugal number, since it uses more digits than its factorization.

39952020238418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525854 (or 262928 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 39952020238418 in words is "thirty-nine trillion, nine hundred fifty-two billion, twenty million, two hundred thirty-eight thousand, four hundred eighteen".