19551046992 has 20 divisors (see below), whose sum is σ = 50506871520. Its totient is φ = 6517015648.

The previous prime is 19551046967. The next prime is 19551046993. The reversal of 19551046992 is 29964015591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19551046993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203656692 + ... + 203656787.

It is an arithmetic number, because the mean of its divisors is an integer number (2525343576).

Almost surely, 2^19551046992 is an apocalyptic number.

19551046992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19551046992 is an abundant number, since it is smaller than the sum of its proper divisors (30955824528).

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

19551046992 is a wasteful number, since it uses less digits than its factorization.

19551046992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407313490 (or 407313484 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 51.

The spelling of 19551046992 in words is "nineteen billion, five hundred fifty-one million, forty-six thousand, nine hundred ninety-two".