20289467520 has 512 divisors, whose sum is σ = 83545344000. Its totient is φ = 4557385728.

The previous prime is 20289467431. The next prime is 20289467521. The reversal of 20289467520 is 2576498202.

20289467520 is a `hidden beast` number, since 2 + 0 + 2 + 89 + 46 + 7 + 520 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (20289467521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7135219 + ... + 7138061.

It is an arithmetic number, because the mean of its divisors is an integer number (163174500).

Almost surely, 2^20289467520 is an apocalyptic number.

20289467520 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 20289467520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41772672000).

20289467520 is an abundant number, since it is smaller than the sum of its proper divisors (63255876480).

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

20289467520 is a wasteful number, since it uses less digits than its factorization.

20289467520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937 (or 2919 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 20289467520 in words is "twenty billion, two hundred eighty-nine million, four hundred sixty-seven thousand, five hundred twenty".