20514323455 has 8 divisors (see below), whose sum is σ = 24619833504. Its totient is φ = 16409695200.

The previous prime is 20514323441. The next prime is 20514323477. The reversal of 20514323455 is 55432341502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20514323455 - 2²³ = 20505934847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20514323455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168136 + ... + 263245.

It is an arithmetic number, because the mean of its divisors is an integer number (3077479188).

Almost surely, 2^20514323455 is an apocalyptic number.

20514323455 is a deficient number, since it is larger than the sum of its proper divisors (4105510049).

20514323455 is an equidigital number, since it uses as much as digits as its factorization.

20514323455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440897.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 20514323455 its reverse (55432341502), we get a palindrome (75946664957).

The spelling of 20514323455 in words is "twenty billion, five hundred fourteen million, three hundred twenty-three thousand, four hundred fifty-five".