20423432403 has 12 divisors (see below), whose sum is σ = 32182378488. Its totient is φ = 12377837760.

The previous prime is 20423432401. The next prime is 20423432417. The reversal of 20423432403 is 30423432402.

20423432403 is a `hidden beast` number, since 20 + 4 + 234 + 3 + 2 + 403 = 666.

It is not a de Polignac number, because 20423432403 - 2¹ = 20423432401 is a prime.

It is a super-2 number, since 2×20423432403² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20423432401) 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, 103148550 + ... + 103148747.

It is an arithmetic number, because the mean of its divisors is an integer number (2681864874).

Almost surely, 2^20423432403 is an apocalyptic number.

20423432403 is a deficient number, since it is larger than the sum of its proper divisors (11758946085).

20423432403 is a wasteful number, since it uses less digits than its factorization.

20423432403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206297314 (or 206297311 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 20423432403 its reverse (30423432402), we get a palindrome (50846864805).

Subtracting 20423432403 from its reverse (30423432402), we obtain a palindrome (9999999999).

The spelling of 20423432403 in words is "twenty billion, four hundred twenty-three million, four hundred thirty-two thousand, four hundred three".