21182910094 has 4 divisors (see below), whose sum is σ = 31774365144. Its totient is φ = 10591455046.

The previous prime is 21182909983. The next prime is 21182910107. The reversal of 21182910094 is 49001928112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5295727522 + ... + 5295727525.

It is an arithmetic number, because the mean of its divisors is an integer number (7943591286).

Almost surely, 2^21182910094 is an apocalyptic number.

21182910094 is a deficient number, since it is larger than the sum of its proper divisors (10591455050).

21182910094 is a wasteful number, since it uses less digits than its factorization.

21182910094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10591455049.

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 21182910094 in words is "twenty-one billion, one hundred eighty-two million, nine hundred ten thousand, ninety-four".