14231778520 has 16 divisors (see below), whose sum is σ = 32021501760. Its totient is φ = 5692711392.

The previous prime is 14231778503. The next prime is 14231778523. The reversal of 14231778520 is 2587713241.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 355794463 = 14231778520 / (1 + 4 + 2 + 3 + 1 + 7 + 7 + 8 + 5 + 2 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14231778523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177897192 + ... + 177897271.

It is an arithmetic number, because the mean of its divisors is an integer number (2001343860).

Almost surely, 2^14231778520 is an apocalyptic number.

14231778520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14231778520 is an abundant number, since it is smaller than the sum of its proper divisors (17789723240).

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

14231778520 is a wasteful number, since it uses less digits than its factorization.

14231778520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355794474 (or 355794470 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 14231778520 in words is "fourteen billion, two hundred thirty-one million, seven hundred seventy-eight thousand, five hundred twenty".