20034523543 has 16 divisors (see below), whose sum is σ = 21597696000. Its totient is φ = 18530043840.

The previous prime is 20034523541. The next prime is 20034523547. The reversal of 20034523543 is 34532543002.

It is not a de Polignac number, because 20034523543 - 2¹ = 20034523541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20034523541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 908158 + ... + 929956.

It is an arithmetic number, because the mean of its divisors is an integer number (1349856000).

Almost surely, 2^20034523543 is an apocalyptic number.

20034523543 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20034523543 is a deficient number, since it is larger than the sum of its proper divisors (1563172457).

20034523543 is a wasteful number, since it uses less digits than its factorization.

20034523543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23142.

The product of its (nonzero) digits is 43200, while the sum is 31.

The spelling of 20034523543 in words is "twenty billion, thirty-four million, five hundred twenty-three thousand, five hundred forty-three".