19782628479 has 12 divisors (see below), whose sum is σ = 28579639296. Its totient is φ = 13186235232.

The previous prime is 19782628477. The next prime is 19782628507. The reversal of 19782628479 is 97482628791.

It is not a de Polignac number, because 19782628479 - 2¹ = 19782628477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19782628477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123622 + ... + 234195.

It is an arithmetic number, because the mean of its divisors is an integer number (2381636608).

Almost surely, 2^19782628479 is an apocalyptic number.

19782628479 is a deficient number, since it is larger than the sum of its proper divisors (8797010817).

19782628479 is a wasteful number, since it uses less digits than its factorization.

19782628479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363966 (or 363963 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The spelling of 19782628479 in words is "nineteen billion, seven hundred eighty-two million, six hundred twenty-eight thousand, four hundred seventy-nine".