20685320470 has 8 divisors (see below), whose sum is σ = 37233576864. Its totient is φ = 8274128184.

The previous prime is 20685320423. The next prime is 20685320471. The reversal of 20685320470 is 7402358602.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20685320471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1034266014 + ... + 1034266033.

It is an arithmetic number, because the mean of its divisors is an integer number (4654197108).

Almost surely, 2^20685320470 is an apocalyptic number.

20685320470 is a deficient number, since it is larger than the sum of its proper divisors (16548256394).

20685320470 is a wasteful number, since it uses less digits than its factorization.

20685320470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068532054.

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

The spelling of 20685320470 in words is "twenty billion, six hundred eighty-five million, three hundred twenty thousand, four hundred seventy".