20223638406 has 24 divisors (see below), whose sum is σ = 43820505144. Its totient is φ = 6740809440.

The previous prime is 20223638401. The next prime is 20223638431. The reversal of 20223638406 is 60483632202.

20223638406 is a `hidden beast` number, since 20 + 223 + 6 + 3 + 8 + 406 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20223638401) 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, 541570 + ... + 577706.

It is an arithmetic number, because the mean of its divisors is an integer number (1825854381).

Almost surely, 2^20223638406 is an apocalyptic number.

20223638406 is an abundant number, since it is smaller than the sum of its proper divisors (23596866738).

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

20223638406 is a wasteful number, since it uses less digits than its factorization.

20223638406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67236 (or 67233 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 20223638406 in words is "twenty billion, two hundred twenty-three million, six hundred thirty-eight thousand, four hundred six".