20331173420 has 24 divisors (see below), whose sum is σ = 42699151824. Its totient is φ = 8131766976.

The previous prime is 20331173419. The next prime is 20331173431. The reversal of 20331173420 is 2437113302.

It is a super-3 number, since 3×20331173420³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 20331173420.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237422 + ... + 311498.

It is an arithmetic number, because the mean of its divisors is an integer number (1779131326).

Almost surely, 2^20331173420 is an apocalyptic number.

20331173420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20331173420 is an abundant number, since it is smaller than the sum of its proper divisors (22367978404).

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

20331173420 is a wasteful number, since it uses less digits than its factorization.

20331173420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87809 (or 87807 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

Adding to 20331173420 its reverse (2437113302), we get a palindrome (22768286722).

The spelling of 20331173420 in words is "twenty billion, three hundred thirty-one million, one hundred seventy-three thousand, four hundred twenty".