13897033920 has 1008 divisors, whose sum is σ = 62565345024. Its totient is φ = 2874009600.

The previous prime is 13897033889. The next prime is 13897033949. The reversal of 13897033920 is 2933079831.

It is a tau number, because it is divible by the number of its divisors (1008).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 65862615 + ... + 65862825.

Almost surely, 2^13897033920 is an apocalyptic number.

13897033920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13897033920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31282672512).

13897033920 is an abundant number, since it is smaller than the sum of its proper divisors (48668311104).

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

13897033920 is a wasteful number, since it uses less digits than its factorization.

13897033920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 13897033920 in words is "thirteen billion, eight hundred ninety-seven million, thirty-three thousand, nine hundred twenty".