20354513043 has 4 divisors (see below), whose sum is σ = 27139350728. Its totient is φ = 13569675360.

The previous prime is 20354513041. The next prime is 20354513111. The reversal of 20354513043 is 34031545302.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20354513043 - 2¹ = 20354513041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20354513043.

It is not an unprimeable number, because it can be changed into a prime (20354513041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3392418838 + ... + 3392418843.

It is an arithmetic number, because the mean of its divisors is an integer number (6784837682).

Almost surely, 2^20354513043 is an apocalyptic number.

20354513043 is a deficient number, since it is larger than the sum of its proper divisors (6784837685).

20354513043 is an equidigital number, since it uses as much as digits as its factorization.

20354513043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6784837684.

The product of its (nonzero) digits is 21600, while the sum is 30.

The spelling of 20354513043 in words is "twenty billion, three hundred fifty-four million, five hundred thirteen thousand, forty-three".