20064719761956 has 27 divisors (see below), whose sum is σ = 50719220668753. Its totient is φ = 6688230961920.

The previous prime is 20064719761921. The next prime is 20064719761979. The reversal of 20064719761956 is 65916791746002.

The square root of 20064719761956 is 4479366.

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

20064719761956 is a `hidden beast` number, since 2 + 0 + 0 + 6 + 4 + 7 + 1 + 9 + 7 + 619 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16554043019556 + 3510676742400 = 4068666^2 + 1873680^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20064719761893 and 20064719761902.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26502916 + ... + 27249476.

Almost surely, 2^{20064719761956} is an apocalyptic number.

20064719761956 is the 4479366-th square number.

It is an amenable number.

20064719761956 is an abundant number, since it is smaller than the sum of its proper divisors (30654500906797).

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

20064719761956 is an frugal number, since it uses more digits than its factorization.

20064719761956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493132 (or 746566 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 63.

The spelling of 20064719761956 in words is "twenty trillion, sixty-four billion, seven hundred nineteen million, seven hundred sixty-one thousand, nine hundred fifty-six".