19542115652 has 12 divisors (see below), whose sum is σ = 34227668076. Its totient is φ = 9762781920.

The previous prime is 19542115627. The next prime is 19542115661. The reversal of 19542115652 is 25651124591.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7542227716 + 11999887936 = 86846^2 + 109544^2 .

It is a super-2 number, since 2×19542115652² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2063663 + ... + 2073110.

It is an arithmetic number, because the mean of its divisors is an integer number (2852305673).

Almost surely, 2^19542115652 is an apocalyptic number.

It is an amenable number.

19542115652 is a deficient number, since it is larger than the sum of its proper divisors (14685552424).

19542115652 is a wasteful number, since it uses less digits than its factorization.

19542115652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137958 (or 4137956 counting only the distinct ones).

The product of its digits is 108000, while the sum is 41.

The spelling of 19542115652 in words is "nineteen billion, five hundred forty-two million, one hundred fifteen thousand, six hundred fifty-two".