19406728964 has 24 divisors (see below), whose sum is σ = 41096603520. Its totient is φ = 7827924096.

The previous prime is 19406728937. The next prime is 19406728967. The reversal of 19406728964 is 46982760491.

It is a super-2 number, since 2×19406728964² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19406728967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20384744 + ... + 20385695.

It is an arithmetic number, because the mean of its divisors is an integer number (1712358480).

Almost surely, 2^19406728964 is an apocalyptic number.

19406728964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19406728964 is an abundant number, since it is smaller than the sum of its proper divisors (21689874556).

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

19406728964 is a wasteful number, since it uses less digits than its factorization.

19406728964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40770467 (or 40770465 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 19406728964 in words is "nineteen billion, four hundred six million, seven hundred twenty-eight thousand, nine hundred sixty-four".