20120746500 has 144 divisors (see below), whose sum is σ = 63555775920. Its totient is φ = 5358643200.

The previous prime is 20120746453. The next prime is 20120746511. The reversal of 20120746500 is 564702102.

20120746500 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 0 + 7 + 4 + 650 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 10320934464 + 9799812036 = 101592^2 + 98994^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4178094 + ... + 4182906.

It is an arithmetic number, because the mean of its divisors is an integer number (441359555).

Almost surely, 2^20120746500 is an apocalyptic number.

20120746500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20120746500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31777887960).

20120746500 is an abundant number, since it is smaller than the sum of its proper divisors (43435029420).

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

20120746500 is a wasteful number, since it uses less digits than its factorization.

20120746500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5767 (or 5752 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The spelling of 20120746500 in words is "twenty billion, one hundred twenty million, seven hundred forty-six thousand, five hundred".