20204734431 has 24 divisors (see below), whose sum is σ = 31382820144. Its totient is φ = 11529033600.

The previous prime is 20204734409. The next prime is 20204734439. The reversal of 20204734431 is 13443740202.

It is not a de Polignac number, because 20204734431 - 2¹⁰ = 20204733407 is a prime.

It is a super-2 number, since 2×20204734431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204734439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5011 + ... + 201083.

It is an arithmetic number, because the mean of its divisors is an integer number (1307617506).

Almost surely, 2^20204734431 is an apocalyptic number.

20204734431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20204734431 is a deficient number, since it is larger than the sum of its proper divisors (11178085713).

20204734431 is a wasteful number, since it uses less digits than its factorization.

20204734431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196791 (or 196784 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 30.

The spelling of 20204734431 in words is "twenty billion, two hundred four million, seven hundred thirty-four thousand, four hundred thirty-one".