19475013642 has 192 divisors, whose sum is σ = 49405593600. Its totient is φ = 5085400320.

The previous prime is 19475013637. The next prime is 19475013739. The reversal of 19475013642 is 24631057491.

It is a super-2 number, since 2×19475013642² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 19475013594 and 19475013603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 21377167 + ... + 21378077.

It is an arithmetic number, because the mean of its divisors is an integer number (257320800).

Almost surely, 2^19475013642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19475013642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24702796800).

19475013642 is an abundant number, since it is smaller than the sum of its proper divisors (29930579958).

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

19475013642 is a wasteful number, since it uses less digits than its factorization.

19475013642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081 (or 1074 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 19475013642 in words is "nineteen billion, four hundred seventy-five million, thirteen thousand, six hundred forty-two".