1513000021023 has 24 divisors (see below), whose sum is σ = 2232023040000. Its totient is φ = 987170415504.

The previous prime is 1513000020997. The next prime is 1513000021031. The reversal of 1513000021023 is 3201200003151.

1513000021023 is a `hidden beast` number, since 151 + 300 + 0 + 0 + 210 + 2 + 3 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1513000021023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1513000020987 and 1513000021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1513000021823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17468578 + ... + 17554976.

It is an arithmetic number, because the mean of its divisors is an integer number (93000960000).

Almost surely, 2^{1513000021023} is an apocalyptic number.

1513000021023 is a deficient number, since it is larger than the sum of its proper divisors (719023018977).

1513000021023 is a wasteful number, since it uses less digits than its factorization.

1513000021023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127851 (or 127848 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 1513000021023 its reverse (3201200003151), we get a palindrome (4714200024174).

The spelling of 1513000021023 in words is "one trillion, five hundred thirteen billion, twenty-one thousand, twenty-three".