20103142500 has 360 divisors, whose sum is σ = 73299786560. Its totient is φ = 4548960000.

The previous prime is 20103142487. The next prime is 20103142517. The reversal of 20103142500 is 524130102.

20103142500 is a `hidden beast` number, since 20 + 1 + 0 + 3 + 142 + 500 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 17166915 + ... + 17168085.

Almost surely, 2^20103142500 is an apocalyptic number.

20103142500 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 20103142500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36649893280).

20103142500 is an abundant number, since it is smaller than the sum of its proper divisors (53196644060).

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

20103142500 is a wasteful number, since it uses less digits than its factorization.

20103142500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 20103142500 its reverse (524130102), we get a palindrome (20627272602).

The spelling of 20103142500 in words is "twenty billion, one hundred three million, one hundred forty-two thousand, five hundred".