19980783 has 16 divisors (see below), whose sum is σ = 29839360. Its totient is φ = 13213368.

The previous prime is 19980743. The next prime is 19980791. The reversal of 19980783 is 38708991.

It is not a de Polignac number, because 19980783 - 2¹⁰ = 19979759 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 (19980713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516 + ... + 6342.

It is an arithmetic number, because the mean of its divisors is an integer number (1864960).

Almost surely, 2^19980783 is an apocalyptic number.

19980783 is a deficient number, since it is larger than the sum of its proper divisors (9858577).

19980783 is a wasteful number, since it uses less digits than its factorization.

19980783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5963 (or 5957 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 19980783 is about 4469.9869127325. The cubic root of 19980783 is about 271.3547955275.

The spelling of 19980783 in words is "nineteen million, nine hundred eighty thousand, seven hundred eighty-three".