38416996921 has 4 divisors (see below), whose sum is σ = 38469408292. Its totient is φ = 38364585552.

The previous prime is 38416996913. The next prime is 38416996931. The reversal of 38416996921 is 12969961483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17335408896 + 21081588025 = 131664^2 + 145195^2 .

It is a cyclic number.

It is not a de Polignac number, because 38416996921 - 2³ = 38416996913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38416996901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26204586 + ... + 26206051.

It is an arithmetic number, because the mean of its divisors is an integer number (9617352073).

Almost surely, 2^38416996921 is an apocalyptic number.

It is an amenable number.

38416996921 is a deficient number, since it is larger than the sum of its proper divisors (52411371).

38416996921 is an equidigital number, since it uses as much as digits as its factorization.

38416996921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52411370.

The product of its digits is 5038848, while the sum is 58.

The spelling of 38416996921 in words is "thirty-eight billion, four hundred sixteen million, nine hundred ninety-six thousand, nine hundred twenty-one".