20170234560 has 672 divisors, whose sum is σ = 78923400192. Its totient is φ = 4342947840.

The previous prime is 20170234549. The next prime is 20170234607. The reversal of 20170234560 is 6543207102.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 111437670 + ... + 111437850.

It is an arithmetic number, because the mean of its divisors is an integer number (117445536).

Almost surely, 2^20170234560 is an apocalyptic number.

20170234560 is a gapful number since it is divisible by the number (20) 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 20170234560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39461700096).

20170234560 is an abundant number, since it is smaller than the sum of its proper divisors (58753165632).

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

20170234560 is a wasteful number, since it uses less digits than its factorization.

20170234560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The spelling of 20170234560 in words is "twenty billion, one hundred seventy million, two hundred thirty-four thousand, five hundred sixty".