20288445397 has 16 divisors (see below), whose sum is σ = 22827619584. Its totient is φ = 17872840000.

The previous prime is 20288445379. The next prime is 20288445403. The reversal of 20288445397 is 79354488202.

It is a cyclic number.

It is not a de Polignac number, because 20288445397 - 2²⁷ = 20154227669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20288445377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142054 + ... + 246487.

It is an arithmetic number, because the mean of its divisors is an integer number (1426726224).

Almost surely, 2^20288445397 is an apocalyptic number.

It is an amenable number.

20288445397 is a deficient number, since it is larger than the sum of its proper divisors (2539174187).

20288445397 is a wasteful number, since it uses less digits than its factorization.

20288445397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388700.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 20288445397 in words is "twenty billion, two hundred eighty-eight million, four hundred forty-five thousand, three hundred ninety-seven".