21115234026 has 48 divisors (see below), whose sum is σ = 46813423176. Its totient is φ = 6875900928.

The previous prime is 21115233977. The next prime is 21115234067. The reversal of 21115234026 is 62043251112.

21115234026 is a `hidden beast` number, since 2 + 111 + 523 + 4 + 0 + 26 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12761091225 + 8354142801 = 112965^2 + 91401^2 .

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, 174786 + ... + 269778.

Almost surely, 2^21115234026 is an apocalyptic number.

21115234026 is an abundant number, since it is smaller than the sum of its proper divisors (25698189150).

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

21115234026 is a wasteful number, since it uses less digits than its factorization.

21115234026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95287 (or 95284 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 21115234026 its reverse (62043251112), we get a palindrome (83158485138).

The spelling of 21115234026 in words is "twenty-one billion, one hundred fifteen million, two hundred thirty-four thousand, twenty-six".