21263094 has 16 divisors (see below), whose sum is σ = 47251440. Its totient is φ = 7087680.

The previous prime is 21263093. The next prime is 21263149. The reversal of 21263094 is 49036212.

21263094 is a `hidden beast` number, since 21 + 2 + 630 + 9 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21263093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196827 + ... + 196934.

It is an arithmetic number, because the mean of its divisors is an integer number (2953215).

Almost surely, 2^21263094 is an apocalyptic number.

21263094 is an abundant number, since it is smaller than the sum of its proper divisors (25988346).

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

21263094 is a wasteful number, since it uses less digits than its factorization.

21263094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393772 (or 393766 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 21263094 is about 4611.1922536368. The cubic root of 21263094 is about 277.0397923606.

The spelling of 21263094 in words is "twenty-one million, two hundred sixty-three thousand, ninety-four".