17042120523 has 16 divisors (see below), whose sum is σ = 25784770560. Its totient is φ = 11119680648.

The previous prime is 17042120519. The next prime is 17042120531. The reversal of 17042120523 is 32502124071.

17042120523 is a `hidden beast` number, since 17 + 0 + 4 + 2 + 120 + 523 = 666.

It is not a de Polignac number, because 17042120523 - 2² = 17042120519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (17042120593) 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, 6713515 + ... + 6716052.

It is an arithmetic number, because the mean of its divisors is an integer number (1611548160).

Almost surely, 2^17042120523 is an apocalyptic number.

17042120523 is a deficient number, since it is larger than the sum of its proper divisors (8742650037).

17042120523 is a wasteful number, since it uses less digits than its factorization.

17042120523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13429623 (or 13429617 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

Adding to 17042120523 its reverse (32502124071), we get a palindrome (49544244594).

The spelling of 17042120523 in words is "seventeen billion, forty-two million, one hundred twenty thousand, five hundred twenty-three".