20125554012 has 36 divisors (see below), whose sum is σ = 50912512560. Its totient is φ = 6703298112.

The previous prime is 20125553957. The next prime is 20125554017. The reversal of 20125554012 is 21045552102.

20125554012 is a `hidden beast` number, since 2 + 0 + 1 + 255 + 5 + 401 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×20125554012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125554017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170448 + ... + 263255.

It is an arithmetic number, because the mean of its divisors is an integer number (1414236460).

Almost surely, 2^20125554012 is an apocalyptic number.

It is an amenable number.

20125554012 is an abundant number, since it is smaller than the sum of its proper divisors (30786958548).

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

20125554012 is a wasteful number, since it uses less digits than its factorization.

20125554012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435002 (or 434997 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 20125554012 in words is "twenty billion, one hundred twenty-five million, five hundred fifty-four thousand, twelve".