21050011430 has 48 divisors (see below), whose sum is σ = 44172230256. Its totient is φ = 7201414080.

The previous prime is 21050011393. The next prime is 21050011483. The reversal of 21050011430 is 3411005012.

It is a junction number, because it is equal to n+sod(n) for n = 21050011399 and 21050011408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179297 + ... + 272483.

It is an arithmetic number, because the mean of its divisors is an integer number (920254797).

Almost surely, 2^21050011430 is an apocalyptic number.

21050011430 is an abundant number, since it is smaller than the sum of its proper divisors (23122218826).

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

21050011430 is a wasteful number, since it uses less digits than its factorization.

21050011430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93669 (or 93662 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 21050011430 its reverse (3411005012), we get a palindrome (24461016442).

The spelling of 21050011430 in words is "twenty-one billion, fifty million, eleven thousand, four hundred thirty".