20228603437920 has 96 divisors (see below), whose sum is σ = 63722498999040. Its totient is φ = 5394091230720.

The previous prime is 20228603437909. The next prime is 20228603437921. The reversal of 20228603437920 is 2973430682202.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 20228603437920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20228603437921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12195351 + ... + 13754409.

It is an arithmetic number, because the mean of its divisors is an integer number (663776031240).

Almost surely, 2^{20228603437920} is an apocalyptic number.

20228603437920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20228603437920 is an abundant number, since it is smaller than the sum of its proper divisors (43493895561120).

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

20228603437920 is a wasteful number, since it uses less digits than its factorization.

20228603437920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586108 (or 1586100 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 48.

The spelling of 20228603437920 in words is "twenty trillion, two hundred twenty-eight billion, six hundred three million, four hundred thirty-seven thousand, nine hundred twenty".