20004356657560 has 64 divisors (see below), whose sum is σ = 49460008713120. Its totient is φ = 7221214325760.

The previous prime is 20004356657531. The next prime is 20004356657573. The reversal of 20004356657560 is 6575665340002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165868359 + ... + 165988918.

Almost surely, 2^{20004356657560} is an apocalyptic number.

20004356657560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20004356657560 is an abundant number, since it is smaller than the sum of its proper divisors (29455652055560).

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

20004356657560 is a wasteful number, since it uses less digits than its factorization.

20004356657560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331857436 (or 331857432 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 49.

The spelling of 20004356657560 in words is "twenty trillion, four billion, three hundred fifty-six million, six hundred fifty-seven thousand, five hundred sixty".