20324323656 has 192 divisors, whose sum is σ = 70257532800. Its totient is φ = 5360214528.

The previous prime is 20324323597. The next prime is 20324323673. The reversal of 20324323656 is 65632342302.

20324323656 is a `hidden beast` number, since 2 + 0 + 324 + 323 + 6 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20324323656.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119460 + ... + 234348.

It is an arithmetic number, because the mean of its divisors is an integer number (365924650).

Almost surely, 2^20324323656 is an apocalyptic number.

20324323656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20324323656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35128766400).

20324323656 is an abundant number, since it is smaller than the sum of its proper divisors (49933209144).

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

20324323656 is a wasteful number, since it uses less digits than its factorization.

20324323656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114930 (or 114914 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 36.

Adding to 20324323656 its reverse (65632342302), we get a palindrome (85956665958).

The spelling of 20324323656 in words is "twenty billion, three hundred twenty-four million, three hundred twenty-three thousand, six hundred fifty-six".