20145355000 has 160 divisors (see below), whose sum is σ = 49506652800. Its totient is φ = 7668144000.

The previous prime is 20145354973. The next prime is 20145355007. The reversal of 20145355000 is 55354102.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145355007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 32544691 + ... + 32545309.

It is an arithmetic number, because the mean of its divisors is an integer number (309416580).

Almost surely, 2^20145355000 is an apocalyptic number.

20145355000 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 20145355000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24753326400).

20145355000 is an abundant number, since it is smaller than the sum of its proper divisors (29361297800).

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

20145355000 is a wasteful number, since it uses less digits than its factorization.

20145355000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951 (or 932 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The spelling of 20145355000 in words is "twenty billion, one hundred forty-five million, three hundred fifty-five thousand".