20365223040 has 256 divisors, whose sum is σ = 75264249600. Its totient is φ = 5194506240.

The previous prime is 20365223003. The next prime is 20365223113. The reversal of 20365223040 is 4032256302.

20365223040 is a `hidden beast` number, since 2 + 0 + 3 + 652 + 2 + 3 + 0 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20365222995 and 20365223013.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 371820 + ... + 423060.

It is an arithmetic number, because the mean of its divisors is an integer number (294000975).

Almost surely, 2^20365223040 is an apocalyptic number.

20365223040 is a gapful number since it is divisible by the number (20) 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 20365223040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37632124800).

20365223040 is an abundant number, since it is smaller than the sum of its proper divisors (54899026560).

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

20365223040 is a wasteful number, since it uses less digits than its factorization.

20365223040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51292 (or 51274 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 20365223040 its reverse (4032256302), we get a palindrome (24397479342).

The spelling of 20365223040 in words is "twenty billion, three hundred sixty-five million, two hundred twenty-three thousand, forty".