19911453004 has 24 divisors (see below), whose sum is σ = 36520259328. Its totient is φ = 9480907920.

The previous prime is 19911452989. The next prime is 19911453049. The reversal of 19911453004 is 40035411991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455832 + ... + 497599.

It is an arithmetic number, because the mean of its divisors is an integer number (1521677472).

Almost surely, 2^19911453004 is an apocalyptic number.

It is an amenable number.

19911453004 is a deficient number, since it is larger than the sum of its proper divisors (16608806324).

19911453004 is a wasteful number, since it uses less digits than its factorization.

19911453004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953685 (or 953683 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

Adding to 19911453004 its reverse (40035411991), we get a palindrome (59946864995).

The spelling of 19911453004 in words is "nineteen billion, nine hundred eleven million, four hundred fifty-three thousand, four".