21123302094 has 64 divisors (see below), whose sum is σ = 49891438080. Its totient is φ = 6601645440.

The previous prime is 21123302059. The next prime is 21123302107. The reversal of 21123302094 is 49020332112.

It is a happy number.

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 an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197689 + ... + 285179.

It is an arithmetic number, because the mean of its divisors is an integer number (779553720).

Almost surely, 2^21123302094 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21123302094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24945719040).

21123302094 is an abundant number, since it is smaller than the sum of its proper divisors (28768135986).

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

21123302094 is a wasteful number, since it uses less digits than its factorization.

21123302094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87782 (or 87776 counting only the distinct ones).

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

The spelling of 21123302094 in words is "twenty-one billion, one hundred twenty-three million, three hundred two thousand, ninety-four".