20225555424 has 72 divisors (see below), whose sum is σ = 58085976312. Its totient is φ = 6675091200.

The previous prime is 20225555417. The next prime is 20225555429. The reversal of 20225555424 is 42455552202.

20225555424 is a `hidden beast` number, since 2 + 0 + 225 + 5 + 5 + 5 + 424 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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 (20225555429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 318574 + ... + 376749.

It is an arithmetic number, because the mean of its divisors is an integer number (806749671).

Almost surely, 2^20225555424 is an apocalyptic number.

20225555424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20225555424 is an abundant number, since it is smaller than the sum of its proper divisors (37860420888).

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

20225555424 is a wasteful number, since it uses less digits than its factorization.

20225555424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695440 (or 695429 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 36.

The spelling of 20225555424 in words is "twenty billion, two hundred twenty-five million, five hundred fifty-five thousand, four hundred twenty-four".