20215423233513 has 16 divisors (see below), whose sum is σ = 30056893493760. Its totient is φ = 13428295572528.

The previous prime is 20215423233503. The next prime is 20215423233539. The reversal of 20215423233513 is 31533232451202.

20215423233513 is a `hidden beast` number, since 2 + 0 + 2 + 1 + 542 + 32 + 33 + 51 + 3 = 666.

It is not a de Polignac number, because 20215423233513 - 2⁴⁰ = 19115911605737 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20215423233503) 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, 1351471545 + ... + 1351486502.

It is an arithmetic number, because the mean of its divisors is an integer number (1878555843360).

Almost surely, 2^{20215423233513} is an apocalyptic number.

It is an amenable number.

20215423233513 is a deficient number, since it is larger than the sum of its proper divisors (9841470260247).

20215423233513 is a wasteful number, since it uses less digits than its factorization.

20215423233513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702958333 (or 2702958327 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

Adding to 20215423233513 its reverse (31533232451202), we get a palindrome (51748655684715).

The spelling of 20215423233513 in words is "twenty trillion, two hundred fifteen billion, four hundred twenty-three million, two hundred thirty-three thousand, five hundred thirteen".