20387943120601 has 45 divisors (see below), whose sum is σ = 24361878301749. Its totient is φ = 17061010644888.

The previous prime is 20387943120581. The next prime is 20387943120637. The reversal of 20387943120601 is 10602134978302.

The square root of 20387943120601 is 4515301.

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

It is not a de Polignac number, because 20387943120601 - 2⁵ = 20387943120569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20387943120401) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 9513738136 + ... + 9513740278.

Almost surely, 2^{20387943120601} is an apocalyptic number.

20387943120601 is the 4515301-st square number.

20387943120601 is the 2257651-st centered octagonal number.

It is an amenable number.

20387943120601 is a deficient number, since it is larger than the sum of its proper divisors (3973935181148).

20387943120601 is an frugal number, since it uses more digits than its factorization.

20387943120601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4400 (or 2193 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 20387943120601 in words is "twenty trillion, three hundred eighty-seven billion, nine hundred forty-three million, one hundred twenty thousand, six hundred one".