20323322040 has 64 divisors (see below), whose sum is σ = 69679964160. Its totient is φ = 4645330560.

The previous prime is 20323321981. The next prime is 20323322057. The reversal of 20323322040 is 4022332302.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20323321998 and 20323322016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12096376 + ... + 12098055.

It is an arithmetic number, because the mean of its divisors is an integer number (1088749440).

Almost surely, 2^20323322040 is an apocalyptic number.

20323322040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20323322040 is an abundant number, since it is smaller than the sum of its proper divisors (49356642120).

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

20323322040 is a wasteful number, since it uses less digits than its factorization.

20323322040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24194452 (or 24194448 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

Adding to 20323322040 its reverse (4022332302), we get a palindrome (24345654342).

The spelling of 20323322040 in words is "twenty billion, three hundred twenty-three million, three hundred twenty-two thousand, forty".