20403022431 has 16 divisors (see below), whose sum is σ = 29706468480. Its totient is φ = 12353241120.

The previous prime is 20403022421. The next prime is 20403022439. The reversal of 20403022431 is 13422030402.

It is not a de Polignac number, because 20403022431 - 2²³ = 20394633823 is a prime.

It is a super-2 number, since 2×20403022431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20403022398 and 20403022407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20403022439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271741 + ... + 338598.

It is an arithmetic number, because the mean of its divisors is an integer number (1856654280).

Almost surely, 2^20403022431 is an apocalyptic number.

20403022431 is a deficient number, since it is larger than the sum of its proper divisors (9303446049).

20403022431 is a wasteful number, since it uses less digits than its factorization.

20403022431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611366.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20403022431 its reverse (13422030402), we get a palindrome (33825052833).

The spelling of 20403022431 in words is "twenty billion, four hundred three million, twenty-two thousand, four hundred thirty-one".