20454330431 has 16 divisors (see below), whose sum is σ = 21516010560. Its totient is φ = 19417923840.

The previous prime is 20454330427. The next prime is 20454330461. The reversal of 20454330431 is 13403345402.

It is a cyclic number.

It is not a de Polignac number, because 20454330431 - 2² = 20454330427 is a prime.

It is a super-2 number, since 2×20454330431² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20454330394 and 20454330403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20454330401) 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, 754691 + ... + 781323.

It is an arithmetic number, because the mean of its divisors is an integer number (1344750660).

Almost surely, 2^20454330431 is an apocalyptic number.

20454330431 is a deficient number, since it is larger than the sum of its proper divisors (1061680129).

20454330431 is a wasteful number, since it uses less digits than its factorization.

20454330431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27106.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 20454330431 its reverse (13403345402), we get a palindrome (33857675833).

The spelling of 20454330431 in words is "twenty billion, four hundred fifty-four million, three hundred thirty thousand, four hundred thirty-one".