20003513023403 has 48 divisors (see below), whose sum is σ = 25854954197760. Its totient is φ = 15138194467968.

The previous prime is 20003513023399. The next prime is 20003513023451. The reversal of 20003513023403 is 30432031530002.

It is a happy number.

It is not a de Polignac number, because 20003513023403 - 2² = 20003513023399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20003513023463) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1290425 + ... + 6455402.

It is an arithmetic number, because the mean of its divisors is an integer number (538644879120).

Almost surely, 2^{20003513023403} is an apocalyptic number.

20003513023403 is a deficient number, since it is larger than the sum of its proper divisors (5851441174357).

20003513023403 is a wasteful number, since it uses less digits than its factorization.

20003513023403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7745956 (or 7745943 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 26.

Adding to 20003513023403 its reverse (30432031530002), we get a palindrome (50435544553405).

The spelling of 20003513023403 in words is "twenty trillion, three billion, five hundred thirteen million, twenty-three thousand, four hundred three".