20551243054 has 16 divisors (see below), whose sum is σ = 31507192080. Its totient is φ = 10051297600.

The previous prime is 20551243039. The next prime is 20551243081. The reversal of 20551243054 is 45034215502.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 596119 + ... + 629650.

It is an arithmetic number, because the mean of its divisors is an integer number (1969199505).

Almost surely, 2^20551243054 is an apocalyptic number.

20551243054 is a deficient number, since it is larger than the sum of its proper divisors (10955949026).

20551243054 is a wasteful number, since it uses less digits than its factorization.

20551243054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225955.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 20551243054 its reverse (45034215502), we get a palindrome (65585458556).

The spelling of 20551243054 in words is "twenty billion, five hundred fifty-one million, two hundred forty-three thousand, fifty-four".