20147452717420 has 24 divisors (see below), whose sum is σ = 48353886522144. Its totient is φ = 6907698074496.

The previous prime is 20147452717393. The next prime is 20147452717421. The reversal of 20147452717420 is 2471725474102.

It is not an unprimeable number, because it can be changed into a prime (20147452717421) 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, 71955188137 + ... + 71955188416.

It is an arithmetic number, because the mean of its divisors is an integer number (2014745271756).

Almost surely, 2^{20147452717420} is an apocalyptic number.

20147452717420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20147452717420 is an abundant number, since it is smaller than the sum of its proper divisors (28206433804724).

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

20147452717420 is a wasteful number, since it uses less digits than its factorization.

20147452717420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143910376569 (or 143910376567 counting only the distinct ones).

The product of its (nonzero) digits is 878080, while the sum is 46.

The spelling of 20147452717420 in words is "twenty trillion, one hundred forty-seven billion, four hundred fifty-two million, seven hundred seventeen thousand, four hundred twenty".