20054511243 has 36 divisors (see below), whose sum is σ = 31719968280. Its totient is φ = 12202489728.

The previous prime is 20054511241. The next prime is 20054511251. The reversal of 20054511243 is 34211545002.

20054511243 is a `hidden beast` number, since 2 + 0 + 0 + 545 + 112 + 4 + 3 = 666.

It is not a de Polignac number, because 20054511243 - 2¹ = 20054511241 is a prime.

It is a super-2 number, since 2×20054511243² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20054511241) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 61296 + ... + 209442.

It is an arithmetic number, because the mean of its divisors is an integer number (881110230).

Almost surely, 2^20054511243 is an apocalyptic number.

20054511243 is a deficient number, since it is larger than the sum of its proper divisors (11665457037).

20054511243 is a wasteful number, since it uses less digits than its factorization.

20054511243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148268 (or 148252 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 20054511243 in words is "twenty billion, fifty-four million, five hundred eleven thousand, two hundred forty-three".