20401352013 has 16 divisors (see below), whose sum is σ = 32159767680. Its totient is φ = 11255918016.

The previous prime is 20401351963. The next prime is 20401352029. The reversal of 20401352013 is 31025310402.

It is not a de Polignac number, because 20401352013 - 2²¹ = 20399254861 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401352053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16749270 + ... + 16750487.

It is an arithmetic number, because the mean of its divisors is an integer number (2009985480).

Almost surely, 2^20401352013 is an apocalyptic number.

It is an amenable number.

20401352013 is a deficient number, since it is larger than the sum of its proper divisors (11758415667).

20401352013 is a wasteful number, since it uses less digits than its factorization.

20401352013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33499796.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20401352013 its reverse (31025310402), we get a palindrome (51426662415).

The spelling of 20401352013 in words is "twenty billion, four hundred one million, three hundred fifty-two thousand, thirteen".