19782000551 has 8 divisors (see below), whose sum is σ = 20108980800. Its totient is φ = 19455107040.

The previous prime is 19782000523. The next prime is 19782000569. The reversal of 19782000551 is 15500028791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19782000551 - 2²² = 19777806247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19782000571) 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, 570530 + ... + 604208.

It is an arithmetic number, because the mean of its divisors is an integer number (2513622600).

Almost surely, 2^19782000551 is an apocalyptic number.

19782000551 is a deficient number, since it is larger than the sum of its proper divisors (326980249).

19782000551 is an equidigital number, since it uses as much as digits as its factorization.

19782000551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43369.

The product of its (nonzero) digits is 25200, while the sum is 38.

The spelling of 19782000551 in words is "nineteen billion, seven hundred eighty-two million, five hundred fifty-one", and thus it is an aban number.