20438036322 has 32 divisors (see below), whose sum is σ = 44642707200. Its totient is φ = 6186312720.

The previous prime is 20438036309. The next prime is 20438036329. The reversal of 20438036322 is 22363083402.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20438036329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117072 + ... + 233627.

It is an arithmetic number, because the mean of its divisors is an integer number (1395084600).

Almost surely, 2^20438036322 is an apocalyptic number.

20438036322 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20438036322 is an abundant number, since it is smaller than the sum of its proper divisors (24204670878).

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

20438036322 is a wasteful number, since it uses less digits than its factorization.

20438036322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351598.

The product of its (nonzero) digits is 41472, while the sum is 33.

The spelling of 20438036322 in words is "twenty billion, four hundred thirty-eight million, thirty-six thousand, three hundred twenty-two".