21263025134 has 16 divisors (see below), whose sum is σ = 36155752080. Its totient is φ = 9297192960.

The previous prime is 21263025103. The next prime is 21263025167. The reversal of 21263025134 is 43152036212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21263025097 and 21263025106.

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 7 ways as a sum of consecutive naturals, for example, 21520787 + ... + 21521774.

It is an arithmetic number, because the mean of its divisors is an integer number (2259734505).

Almost surely, 2^21263025134 is an apocalyptic number.

21263025134 is a deficient number, since it is larger than the sum of its proper divisors (14892726946).

21263025134 is a wasteful number, since it uses less digits than its factorization.

21263025134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43042595.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 21263025134 in words is "twenty-one billion, two hundred sixty-three million, twenty-five thousand, one hundred thirty-four".