20487858880 has 56 divisors (see below), whose sum is σ = 49289744448. Its totient is φ = 8110645248.

The previous prime is 20487858871. The next prime is 20487858883. The reversal of 20487858880 is 8885878402.

It is a super-2 number, since 2×20487858880² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20487858883) 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, 298984 + ... + 361063.

It is an arithmetic number, because the mean of its divisors is an integer number (880174008).

Almost surely, 2^20487858880 is an apocalyptic number.

20487858880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20487858880 is an abundant number, since it is smaller than the sum of its proper divisors (28801885568).

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

20487858880 is an equidigital number, since it uses as much as digits as its factorization.

20487858880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660161 (or 660151 counting only the distinct ones).

The product of its (nonzero) digits is 9175040, while the sum is 58.

The spelling of 20487858880 in words is "twenty billion, four hundred eighty-seven million, eight hundred fifty-eight thousand, eight hundred eighty".