20707497801 has 45 divisors (see below), whose sum is σ = 31583145693. Its totient is φ = 13520937960.

The previous prime is 20707497781. The next prime is 20707497827. The reversal of 20707497801 is 10879470702.

It is a happy number.

The square root of 20707497801 is 143901.

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

It is not a de Polignac number, because 20707497801 - 2⁷ = 20707497673 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20707497101) 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, 76411296 + ... + 76411566.

Almost surely, 2^20707497801 is an apocalyptic number.

20707497801 is the 143901-st square number.

20707497801 is the 71951-st centered octagonal number.

It is an amenable number.

20707497801 is a deficient number, since it is larger than the sum of its proper divisors (10875647892).

20707497801 is an frugal number, since it uses more digits than its factorization.

20707497801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The spelling of 20707497801 in words is "twenty billion, seven hundred seven million, four hundred ninety-seven thousand, eight hundred one".