9920455381 has 16 divisors (see below), whose sum is σ = 10417204224. Its totient is φ = 9429323904.

The previous prime is 9920455379. The next prime is 9920455471. The reversal of 9920455381 is 1835540299.

9920455381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9920455381 - 2¹ = 9920455379 is a prime.

It is a super-2 number, since 2×9920455381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920155381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3470905 + ... + 3473761.

It is an arithmetic number, because the mean of its divisors is an integer number (651075264).

Almost surely, 2^9920455381 is an apocalyptic number.

It is an amenable number.

9920455381 is a deficient number, since it is larger than the sum of its proper divisors (496748843).

9920455381 is a wasteful number, since it uses less digits than its factorization.

9920455381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780.

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 9920455381 is about 99601.4828253074. The cubic root of 9920455381 is about 2148.7070200158.

The spelling of 9920455381 in words is "nine billion, nine hundred twenty million, four hundred fifty-five thousand, three hundred eighty-one".