20423543403 has 8 divisors (see below), whose sum is σ = 28664622400. Its totient is φ = 12899080008.

The previous prime is 20423543377. The next prime is 20423543423. The reversal of 20423543403 is 30434532402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20423543403 - 2⁹ = 20423542891 is a prime.

It is a super-2 number, since 2×20423543403² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20423543423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179153833 + ... + 179153946.

It is an arithmetic number, because the mean of its divisors is an integer number (3583077800).

Almost surely, 2^20423543403 is an apocalyptic number.

20423543403 is a deficient number, since it is larger than the sum of its proper divisors (8241078997).

20423543403 is a wasteful number, since it uses less digits than its factorization.

20423543403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358307801.

The product of its (nonzero) digits is 34560, while the sum is 30.

The spelling of 20423543403 in words is "twenty billion, four hundred twenty-three million, five hundred forty-three thousand, four hundred three".