20477749254660 has 96 divisors (see below), whose sum is σ = 63716796259200. Its totient is φ = 5460026590080.

The previous prime is 20477749254643. The next prime is 20477749254671. The reversal of 20477749254660 is 6645294777402.

20477749254660 is a `hidden beast` number, since 2 + 0 + 47 + 7 + 7 + 49 + 2 + 546 + 6 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1730731 + ... + 6629549.

It is an arithmetic number, because the mean of its divisors is an integer number (663716627700).

Almost surely, 2^{20477749254660} is an apocalyptic number.

20477749254660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20477749254660 is an abundant number, since it is smaller than the sum of its proper divisors (43239047004540).

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

20477749254660 is a wasteful number, since it uses less digits than its factorization.

20477749254660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4906578 (or 4906570 counting only the distinct ones).

The product of its (nonzero) digits is 142248960, while the sum is 63.

The spelling of 20477749254660 in words is "twenty trillion, four hundred seventy-seven billion, seven hundred forty-nine million, two hundred fifty-four thousand, six hundred sixty".