20155400573 has 16 divisors (see below), whose sum is σ = 25144957440. Its totient is φ = 15695415600.

The previous prime is 20155400569. The next prime is 20155400593. The reversal of 20155400573 is 37500455102.

It is a cyclic number.

It is not a de Polignac number, because 20155400573 - 2² = 20155400569 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155400593) 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, 37658 + ... + 204276.

It is an arithmetic number, because the mean of its divisors is an integer number (1571559840).

Almost surely, 2^20155400573 is an apocalyptic number.

It is an amenable number.

20155400573 is a deficient number, since it is larger than the sum of its proper divisors (4989556867).

20155400573 is a wasteful number, since it uses less digits than its factorization.

20155400573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168208.

The product of its (nonzero) digits is 21000, while the sum is 32.

Adding to 20155400573 its reverse (37500455102), we get a palindrome (57655855675).

The spelling of 20155400573 in words is "twenty billion, one hundred fifty-five million, four hundred thousand, five hundred seventy-three".