10519816842 has 20 divisors (see below), whose sum is σ = 23572182546. Its totient is φ = 3506605560.

The previous prime is 10519816841. The next prime is 10519816873. The reversal of 10519816842 is 24861891501.

It is a happy number.

10519816842 is a `hidden beast` number, since 10 + 519 + 81 + 6 + 8 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5605666641 + 4914150201 = 74871^2 + 70101^2 .

It is a super-2 number, since 2×10519816842² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10519816841) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 32468409 + ... + 32468732.

Almost surely, 2^10519816842 is an apocalyptic number.

10519816842 is an abundant number, since it is smaller than the sum of its proper divisors (13052365704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10519816842 is an equidigital number, since it uses as much as digits as its factorization.

10519816842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64937155 (or 64937146 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 10519816842 in words is "ten billion, five hundred nineteen million, eight hundred sixteen thousand, eight hundred forty-two".