20218404960 has 144 divisors (see below), whose sum is σ = 74302707024. Its totient is φ = 4976833536.

The previous prime is 20218404889. The next prime is 20218404961. The reversal of 20218404960 is 6940481202.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20218404961) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 521302 + ... + 558741.

It is an arithmetic number, because the mean of its divisors is an integer number (515991021).

Almost surely, 2^20218404960 is an apocalyptic number.

20218404960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20218404960 is an abundant number, since it is smaller than the sum of its proper divisors (54084302064).

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

20218404960 is a wasteful number, since it uses less digits than its factorization.

20218404960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080077 (or 1080066 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 20218404960 in words is "twenty billion, two hundred eighteen million, four hundred four thousand, nine hundred sixty".