20550331001424 has 80 divisors (see below), whose sum is σ = 63865690350080. Its totient is φ = 5562495607680.

The previous prime is 20550331001383. The next prime is 20550331001429. The reversal of 20550331001424 is 42410013305502.

It is a super-2 number, since 2×20550331001424² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20550331001391 and 20550331001400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550331001429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1609512022 + ... + 1609524789.

It is an arithmetic number, because the mean of its divisors is an integer number (798321129376).

Almost surely, 2^{20550331001424} is an apocalyptic number.

20550331001424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20550331001424 is an abundant number, since it is smaller than the sum of its proper divisors (43315359348656).

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

20550331001424 is a wasteful number, since it uses less digits than its factorization.

20550331001424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219036848 (or 3219036842 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 20550331001424 its reverse (42410013305502), we get a palindrome (62960344306926).

The spelling of 20550331001424 in words is "twenty trillion, five hundred fifty billion, three hundred thirty-one million, one thousand, four hundred twenty-four".