20455191384 has 64 divisors (see below), whose sum is σ = 54168652800. Its totient is φ = 6414641664.

The previous prime is 20455191343. The next prime is 20455191389. The reversal of 20455191384 is 48319155402.

It is a super-3 number, since 3×20455191384³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20455191389) 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, 1119877 + ... + 1137995.

It is an arithmetic number, because the mean of its divisors is an integer number (846385200).

Almost surely, 2^20455191384 is an apocalyptic number.

20455191384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20455191384 is an abundant number, since it is smaller than the sum of its proper divisors (33713461416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20455191384 is a wasteful number, since it uses less digits than its factorization.

20455191384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20912 (or 20908 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 20455191384 in words is "twenty billion, four hundred fifty-five million, one hundred ninety-one thousand, three hundred eighty-four".