20702117801764 has 27 divisors (see below), whose sum is σ = 42143726627793. Its totient is φ = 8872308901008.

The previous prime is 20702117801741. The next prime is 20702117801809. The reversal of 20702117801764 is 46710871120702.

The square root of 20702117801764 is 4549958.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3717762422500 + 16984355379264 = 1928150^2 + 4121208^2 .

It is a super-2 number, since 2×20702117801764² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 63536914 + ... + 63861910.

Almost surely, 2^{20702117801764} is an apocalyptic number.

20702117801764 is the 4549958-th square number.

It is an amenable number.

20702117801764 is an abundant number, since it is smaller than the sum of its proper divisors (21441608826029).

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

20702117801764 is an frugal number, since it uses more digits than its factorization.

20702117801764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650012 (or 325006 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 46.

The spelling of 20702117801764 in words is "twenty trillion, seven hundred two billion, one hundred seventeen million, eight hundred one thousand, seven hundred sixty-four".