20555574120 has 96 divisors (see below), whose sum is σ = 69279930720. Its totient is φ = 5481483840.

The previous prime is 20555574107. The next prime is 20555574131. The reversal of 20555574120 is 2147555502.

20555574120 is a `hidden beast` number, since 20 + 5 + 55 + 574 + 12 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1047666 + ... + 1067105.

It is an arithmetic number, because the mean of its divisors is an integer number (721665945).

Almost surely, 2^20555574120 is an apocalyptic number.

20555574120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20555574120 is an abundant number, since it is smaller than the sum of its proper divisors (48724356600).

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

20555574120 is a wasteful number, since it uses less digits than its factorization.

20555574120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114797 (or 2114781 counting only the distinct ones).

The product of its (nonzero) digits is 70000, while the sum is 36.

The spelling of 20555574120 in words is "twenty billion, five hundred fifty-five million, five hundred seventy-four thousand, one hundred twenty".