20423432004 has 24 divisors (see below), whose sum is σ = 49297940160. Its totient is φ = 6573058464.

The previous prime is 20423431927. The next prime is 20423432009. The reversal of 20423432004 is 40023432402.

It is a super-2 number, since 2×20423432004² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20423432009) 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, 29343664 + ... + 29344359.

It is an arithmetic number, because the mean of its divisors is an integer number (2054080840).

Almost surely, 2^20423432004 is an apocalyptic number.

It is an amenable number.

20423432004 is an abundant number, since it is smaller than the sum of its proper divisors (28874508156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20423432004 is a wasteful number, since it uses less digits than its factorization.

20423432004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58688059 (or 58688057 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 20423432004 its reverse (40023432402), we get a palindrome (60446864406).

The spelling of 20423432004 in words is "twenty billion, four hundred twenty-three million, four hundred thirty-two thousand, four".