20543674743 has 12 divisors (see below), whose sum is σ = 30177150120. Its totient is φ = 13463650896.

The previous prime is 20543674663. The next prime is 20543674747. The reversal of 20543674743 is 34747634502.

20543674743 is a `hidden beast` number, since 2 + 0 + 543 + 67 + 4 + 7 + 43 = 666.

It is not a de Polignac number, because 20543674743 - 2²¹ = 20541577591 is a prime.

It is a super-2 number, since 2×20543674743² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20543674747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19343796 + ... + 19344857.

It is an arithmetic number, because the mean of its divisors is an integer number (2514762510).

Almost surely, 2^20543674743 is an apocalyptic number.

20543674743 is a deficient number, since it is larger than the sum of its proper divisors (9633475377).

20543674743 is a wasteful number, since it uses less digits than its factorization.

20543674743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38688718 (or 38688715 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 45.

The spelling of 20543674743 in words is "twenty billion, five hundred forty-three million, six hundred seventy-four thousand, seven hundred forty-three".