20203452291 has 16 divisors (see below), whose sum is σ = 29413680768. Its totient is φ = 12233332800.

The previous prime is 20203452271. The next prime is 20203452299. The reversal of 20203452291 is 19225430202.

It is not a de Polignac number, because 20203452291 - 2³¹ = 18055968643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20203452299) 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, 242845 + ... + 315246.

It is an arithmetic number, because the mean of its divisors is an integer number (1838355048).

Almost surely, 2^20203452291 is an apocalyptic number.

20203452291 is a deficient number, since it is larger than the sum of its proper divisors (9210228477).

20203452291 is a wasteful number, since it uses less digits than its factorization.

20203452291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559202.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 20203452291 its reverse (19225430202), we get a palindrome (39428882493).

The spelling of 20203452291 in words is "twenty billion, two hundred three million, four hundred fifty-two thousand, two hundred ninety-one".