19613557234 has 32 divisors (see below), whose sum is σ = 33066823680. Its totient is φ = 8680007952.

The previous prime is 19613557231. The next prime is 19613557247. The reversal of 19613557234 is 43275531691.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (19613557231) 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, 223362 + ... + 298525.

It is an arithmetic number, because the mean of its divisors is an integer number (1033338240).

Almost surely, 2^19613557234 is an apocalyptic number.

19613557234 is a deficient number, since it is larger than the sum of its proper divisors (13453266446).

19613557234 is a wasteful number, since it uses less digits than its factorization.

19613557234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521974.

The product of its digits is 680400, while the sum is 46.

The spelling of 19613557234 in words is "nineteen billion, six hundred thirteen million, five hundred fifty-seven thousand, two hundred thirty-four".