20471191344 has 40 divisors (see below), whose sum is σ = 58759902320. Its totient is φ = 6823730304.

The previous prime is 20471191343. The next prime is 20471191381. The reversal of 20471191344 is 44319117402.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20471191299 and 20471191308.

It is not an unprimeable number, because it can be changed into a prime (20471191343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23693077 + ... + 23693940.

It is an arithmetic number, because the mean of its divisors is an integer number (1468997558).

Almost surely, 2^20471191344 is an apocalyptic number.

20471191344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20471191344 is an abundant number, since it is smaller than the sum of its proper divisors (38288710976).

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

20471191344 is a wasteful number, since it uses less digits than its factorization.

20471191344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47387034 (or 47387022 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 20471191344 in words is "twenty billion, four hundred seventy-one million, one hundred ninety-one thousand, three hundred forty-four".