20401155313 has 32 divisors (see below), whose sum is σ = 25842845952. Its totient is φ = 15643238400.

The previous prime is 20401155301. The next prime is 20401155389. The reversal of 20401155313 is 31355110402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20401155313 - 2⁹ = 20401154801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20401152313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2587345 + ... + 2595217.

It is an arithmetic number, because the mean of its divisors is an integer number (807588936).

Almost surely, 2^20401155313 is an apocalyptic number.

It is an amenable number.

20401155313 is a deficient number, since it is larger than the sum of its proper divisors (5441690639).

20401155313 is a wasteful number, since it uses less digits than its factorization.

20401155313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8425.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 20401155313 its reverse (31355110402), we get a palindrome (51756265715).

The spelling of 20401155313 in words is "twenty billion, four hundred one million, one hundred fifty-five thousand, three hundred thirteen".