13928066920 has 32 divisors (see below), whose sum is σ = 31344942600. Its totient is φ = 5570019328.

The previous prime is 13928066899. The next prime is 13928066923. The reversal of 13928066920 is 2966082931.

It can be written as a sum of positive squares in 4 ways, for example, as 11076720516 + 2851346404 = 105246^2 + 53398^2 .

It is not an unprimeable number, because it can be changed into a prime (13928066923) 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, 162216 + ... + 232744.

Almost surely, 2^13928066920 is an apocalyptic number.

13928066920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13928066920 is an abundant number, since it is smaller than the sum of its proper divisors (17416875680).

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

13928066920 is a wasteful number, since it uses less digits than its factorization.

13928066920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75477 (or 75473 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 13928066920 in words is "thirteen billion, nine hundred twenty-eight million, sixty-six thousand, nine hundred twenty".