19939416 has 32 divisors (see below), whose sum is σ = 56970240. Its totient is φ = 5696928.

The previous prime is 19939397. The next prime is 19939433. The reversal of 19939416 is 61493991.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59176 + ... + 59511.

It is an arithmetic number, because the mean of its divisors is an integer number (1780320).

Almost surely, 2^19939416 is an apocalyptic number.

It is an amenable number.

19939416 is an abundant number, since it is smaller than the sum of its proper divisors (37030824).

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

19939416 is a wasteful number, since it uses less digits than its factorization.

19939416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118703 (or 118699 counting only the distinct ones).

The product of its digits is 52488, while the sum is 42.

The square root of 19939416 is about 4465.3573205288. The cubic root of 19939416 is about 271.1674006465.

The spelling of 19939416 in words is "nineteen million, nine hundred thirty-nine thousand, four hundred sixteen".