19928516 has 6 divisors (see below), whose sum is σ = 34874910. Its totient is φ = 9964256.

The previous prime is 19928509. The next prime is 19928521. The reversal of 19928516 is 61582991.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19360000 + 568516 = 4400^2 + 754^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2491061 + ... + 2491068.

It is an arithmetic number, because the mean of its divisors is an integer number (5812485).

Almost surely, 2^19928516 is an apocalyptic number.

It is an amenable number.

19928516 is a deficient number, since it is larger than the sum of its proper divisors (14946394).

19928516 is a wasteful number, since it uses less digits than its factorization.

19928516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4982133 (or 4982131 counting only the distinct ones).

The product of its digits is 38880, while the sum is 41.

The square root of 19928516 is about 4464.1366466541. The cubic root of 19928516 is about 271.1179798841.

The spelling of 19928516 in words is "nineteen million, nine hundred twenty-eight thousand, five hundred sixteen".