20311454553 has 16 divisors (see below), whose sum is σ = 29209325376. Its totient is φ = 12480431040.

The previous prime is 20311454549. The next prime is 20311454557. The reversal of 20311454553 is 35545411302.

It is an interprime number because it is at equal distance from previous prime (20311454549) and next prime (20311454557).

It is not a de Polignac number, because 20311454553 - 2² = 20311454549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20311454557) 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, 368175 + ... + 419732.

It is an arithmetic number, because the mean of its divisors is an integer number (1825582836).

Almost surely, 2^20311454553 is an apocalyptic number.

It is an amenable number.

20311454553 is a deficient number, since it is larger than the sum of its proper divisors (8897870823).

20311454553 is a wasteful number, since it uses less digits than its factorization.

20311454553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788584.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 20311454553 its reverse (35545411302), we get a palindrome (55856865855).

The spelling of 20311454553 in words is "twenty billion, three hundred eleven million, four hundred fifty-four thousand, five hundred fifty-three".