20103134420 has 12 divisors (see below), whose sum is σ = 42216582324. Its totient is φ = 8041253760.

The previous prime is 20103134407. The next prime is 20103134453. The reversal of 20103134420 is 2443130102.

It can be written as a sum of positive squares in 2 ways, for example, as 15688063504 + 4415070916 = 125252^2 + 66446^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1005156721 = 20103134420 / (2 + 0 + 1 + 0 + 3 + 1 + 3 + 4 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 20103134392 and 20103134401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502578341 + ... + 502578380.

It is an arithmetic number, because the mean of its divisors is an integer number (3518048527).

Almost surely, 2^20103134420 is an apocalyptic number.

20103134420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20103134420 is an abundant number, since it is smaller than the sum of its proper divisors (22113447904).

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

20103134420 is a wasteful number, since it uses less digits than its factorization.

20103134420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005156730 (or 1005156728 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20103134420 its reverse (2443130102), we get a palindrome (22546264522).

The spelling of 20103134420 in words is "twenty billion, one hundred three million, one hundred thirty-four thousand, four hundred twenty".