20400023223 has 48 divisors (see below), whose sum is σ = 30712849440. Its totient is φ = 13037303808.

The previous prime is 20400023221. The next prime is 20400023251. The reversal of 20400023223 is 32232000402.

20400023223 is a `hidden beast` number, since 20 + 400 + 0 + 23 + 223 = 666.

It is not a de Polignac number, because 20400023223 - 2¹ = 20400023221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20400023196 and 20400023205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400023221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6339711 + ... + 6342927.

It is an arithmetic number, because the mean of its divisors is an integer number (639851030).

Almost surely, 2^20400023223 is an apocalyptic number.

20400023223 is a deficient number, since it is larger than the sum of its proper divisors (10312826217).

20400023223 is a wasteful number, since it uses less digits than its factorization.

20400023223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3536 (or 3533 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

Adding to 20400023223 its reverse (32232000402), we get a palindrome (52632023625).

The spelling of 20400023223 in words is "twenty billion, four hundred million, twenty-three thousand, two hundred twenty-three".