19974561432 has 32 divisors (see below), whose sum is σ = 57070176000. Its totient is φ = 5707017504.

The previous prime is 19974561427. The next prime is 19974561463. The reversal of 19974561432 is 23416547991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59447932 + ... + 59448267.

It is an arithmetic number, because the mean of its divisors is an integer number (1783443000).

Almost surely, 2^19974561432 is an apocalyptic number.

19974561432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19974561432 is an abundant number, since it is smaller than the sum of its proper divisors (37095614568).

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

19974561432 is a wasteful number, since it uses less digits than its factorization.

19974561432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118896215 (or 118896211 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 51.

The spelling of 19974561432 in words is "nineteen billion, nine hundred seventy-four million, five hundred sixty-one thousand, four hundred thirty-two".