21203100030 has 32 divisors (see below), whose sum is σ = 58157074944. Its totient is φ = 4846422816.

The previous prime is 21203100011. The next prime is 21203100047. The reversal of 21203100030 is 3000130212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21203099979 and 21203100015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50483362 + ... + 50483781.

It is an arithmetic number, because the mean of its divisors is an integer number (1817408592).

Almost surely, 2^21203100030 is an apocalyptic number.

21203100030 is an abundant number, since it is smaller than the sum of its proper divisors (36953974914).

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

21203100030 is a wasteful number, since it uses less digits than its factorization.

21203100030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100967160.

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

Adding to 21203100030 its reverse (3000130212), we get a palindrome (24203230242).

The spelling of 21203100030 in words is "twenty-one billion, two hundred three million, one hundred thousand, thirty".