20616717340 has 24 divisors (see below), whose sum is σ = 43342256160. Its totient is φ = 8237706048.

The previous prime is 20616717311. The next prime is 20616717383. The reversal of 20616717340 is 4371761602.

It is a self number, because there is not a number n which added to its sum of digits gives 20616717340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 542467 + ... + 579226.

It is an arithmetic number, because the mean of its divisors is an integer number (1805927340).

Almost surely, 2^20616717340 is an apocalyptic number.

20616717340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20616717340 is an abundant number, since it is smaller than the sum of its proper divisors (22725538820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20616717340 is a wasteful number, since it uses less digits than its factorization.

20616717340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122621 (or 1122619 counting only the distinct ones).

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

The spelling of 20616717340 in words is "twenty billion, six hundred sixteen million, seven hundred seventeen thousand, three hundred forty".