21702342790 has 16 divisors (see below), whose sum is σ = 39066293520. Its totient is φ = 8680475680.

The previous prime is 21702342751. The next prime is 21702342799. The reversal of 21702342790 is 9724320712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21702342799) by changing a digit.

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, 190845 + ... + 282535.

It is an arithmetic number, because the mean of its divisors is an integer number (2441643345).

Almost surely, 2^21702342790 is an apocalyptic number.

21702342790 is a deficient number, since it is larger than the sum of its proper divisors (17363950730).

21702342790 is a wasteful number, since it uses less digits than its factorization.

21702342790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115367.

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 21702342790 in words is "twenty-one billion, seven hundred two million, three hundred forty-two thousand, seven hundred ninety".