20055552240 has 80 divisors (see below), whose sum is σ = 62189769600. Its totient is φ = 5346637056.

The previous prime is 20055552217. The next prime is 20055552241. The reversal of 20055552240 is 4225555002.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20055552198 and 20055552207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20055552241) 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, 1031731 + ... + 1050989.

It is an arithmetic number, because the mean of its divisors is an integer number (777372120).

Almost surely, 2^20055552240 is an apocalyptic number.

20055552240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20055552240 is an abundant number, since it is smaller than the sum of its proper divisors (42134217360).

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

20055552240 is a wasteful number, since it uses less digits than its factorization.

20055552240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23614 (or 23608 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 30.

The spelling of 20055552240 in words is "twenty billion, fifty-five million, five hundred fifty-two thousand, two hundred forty".