21112346902 has 4 divisors (see below), whose sum is σ = 31668520356. Its totient is φ = 10556173450.

The previous prime is 21112346891. The next prime is 21112346911. The reversal of 21112346902 is 20964321112.

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 (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278086724 + ... + 5278086727.

It is an arithmetic number, because the mean of its divisors is an integer number (7917130089).

Almost surely, 2^21112346902 is an apocalyptic number.

21112346902 is a deficient number, since it is larger than the sum of its proper divisors (10556173454).

21112346902 is a wasteful number, since it uses less digits than its factorization.

21112346902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10556173453.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 21112346902 in words is "twenty-one billion, one hundred twelve million, three hundred forty-six thousand, nine hundred two".