20545372120 has 128 divisors (see below), whose sum is σ = 57482409600. Its totient is φ = 6435127296.

The previous prime is 20545372091. The next prime is 20545372121. The reversal of 20545372120 is 2127354502.

It is a super-2 number, since 2×20545372120² (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 (20545372121) 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 31 ways as a sum of consecutive naturals, for example, 323986 + ... + 382174.

It is an arithmetic number, because the mean of its divisors is an integer number (449081325).

Almost surely, 2^20545372120 is an apocalyptic number.

20545372120 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 20545372120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28741204800).

20545372120 is an abundant number, since it is smaller than the sum of its proper divisors (36937037480).

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

20545372120 is a wasteful number, since it uses less digits than its factorization.

20545372120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58317 (or 58313 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The spelling of 20545372120 in words is "twenty billion, five hundred forty-five million, three hundred seventy-two thousand, one hundred twenty".