20100123030 has 32 divisors (see below), whose sum is σ = 51951088224. Its totient is φ = 4947722496.

The previous prime is 20100123007. The next prime is 20100123059. The reversal of 20100123030 is 3032100102.

It is a happy number.

It is a super-2 number, since 2×20100123030² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20100122997 and 20100123015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25768999 + ... + 25769778.

It is an arithmetic number, because the mean of its divisors is an integer number (1623471507).

Almost surely, 2^20100123030 is an apocalyptic number.

20100123030 is an abundant number, since it is smaller than the sum of its proper divisors (31850965194).

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

20100123030 is a wasteful number, since it uses less digits than its factorization.

20100123030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51538800.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 20100123030 its reverse (3032100102), we get a palindrome (23132223132).

The spelling of 20100123030 in words is "twenty billion, one hundred million, one hundred twenty-three thousand, thirty".