13785478420 has 24 divisors (see below), whose sum is σ = 33085148544. Its totient is φ = 4726449696.

The previous prime is 13785478391. The next prime is 13785478423. The reversal of 13785478420 is 2487458731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13785478423) 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, 49233712 + ... + 49233991.

It is an arithmetic number, because the mean of its divisors is an integer number (1378547856).

Almost surely, 2^13785478420 is an apocalyptic number.

13785478420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13785478420 is an abundant number, since it is smaller than the sum of its proper divisors (19299670124).

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

13785478420 is a wasteful number, since it uses less digits than its factorization.

13785478420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98467719 (or 98467717 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 49.

The spelling of 13785478420 in words is "thirteen billion, seven hundred eighty-five million, four hundred seventy-eight thousand, four hundred twenty".