19438652506 has 96 divisors (see below), whose sum is σ = 38835659520. Its totient is φ = 7212240000.

The previous prime is 19438652501. The next prime is 19438652521. The reversal of 19438652506 is 60525683491.

It is a super-2 number, since 2×19438652506² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 19438652506.

It is not an unprimeable number, because it can be changed into a prime (19438652501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2440831 + ... + 2448781.

It is an arithmetic number, because the mean of its divisors is an integer number (404538120).

Almost surely, 2^19438652506 is an apocalyptic number.

19438652506 is a deficient number, since it is larger than the sum of its proper divisors (19397007014).

19438652506 is a wasteful number, since it uses less digits than its factorization.

19438652506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8100 (or 8093 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 19438652506 in words is "nineteen billion, four hundred thirty-eight million, six hundred fifty-two thousand, five hundred six".