21853423702 has 8 divisors (see below), whose sum is σ = 35760147912. Its totient is φ = 9933374400.

The previous prime is 21853423699. The next prime is 21853423717. The reversal of 21853423702 is 20732435812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496668699 + ... + 496668742.

It is an arithmetic number, because the mean of its divisors is an integer number (4470018489).

Almost surely, 2^21853423702 is an apocalyptic number.

21853423702 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21853423702 is a deficient number, since it is larger than the sum of its proper divisors (13906724210).

21853423702 is a wasteful number, since it uses less digits than its factorization.

21853423702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993337454.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 21853423702 in words is "twenty-one billion, eight hundred fifty-three million, four hundred twenty-three thousand, seven hundred two".