20218258480 has 80 divisors (see below), whose sum is σ = 54819259200. Its totient is φ = 6931964928.

The previous prime is 20218258453. The next prime is 20218258493. The reversal of 20218258480 is 8485281202.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340969 + ... + 395848.

It is an arithmetic number, because the mean of its divisors is an integer number (685240740).

Almost surely, 2^20218258480 is an apocalyptic number.

20218258480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20218258480 is an abundant number, since it is smaller than the sum of its proper divisors (34601000720).

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

20218258480 is an equidigital number, since it uses as much as digits as its factorization.

20218258480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736851 (or 736831 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 40.

The spelling of 20218258480 in words is "twenty billion, two hundred eighteen million, two hundred fifty-eight thousand, four hundred eighty".