20543231454 has 32 divisors (see below), whose sum is σ = 41351095296. Its totient is φ = 6803676000.

The previous prime is 20543231441. The next prime is 20543231461. The reversal of 20543231454 is 45413234502.

It is a super-2 number, since 2×20543231454² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3731704 + ... + 3737204.

It is an arithmetic number, because the mean of its divisors is an integer number (1292221728).

Almost surely, 2^20543231454 is an apocalyptic number.

20543231454 is an abundant number, since it is smaller than the sum of its proper divisors (20807863842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20543231454 is a wasteful number, since it uses less digits than its factorization.

20543231454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9400.

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 20543231454 its reverse (45413234502), we get a palindrome (65956465956).

The spelling of 20543231454 in words is "twenty billion, five hundred forty-three million, two hundred thirty-one thousand, four hundred fifty-four".