20155332044 has 48 divisors (see below), whose sum is σ = 36367349760. Its totient is φ = 9769119360.

The previous prime is 20155331981. The next prime is 20155332089. The reversal of 20155332044 is 44023355102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20155331998 and 20155332016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22123949 + ... + 22124859.

It is an arithmetic number, because the mean of its divisors is an integer number (757653120).

Almost surely, 2^20155332044 is an apocalyptic number.

It is an amenable number.

20155332044 is a deficient number, since it is larger than the sum of its proper divisors (16212017716).

20155332044 is a wasteful number, since it uses less digits than its factorization.

20155332044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958 (or 1956 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 20155332044 its reverse (44023355102), we get a palindrome (64178687146).

The spelling of 20155332044 in words is "twenty billion, one hundred fifty-five million, three hundred thirty-two thousand, forty-four".