19485816 has 32 divisors (see below), whose sum is σ = 55674240. Its totient is φ = 5567328.

The previous prime is 19485799. The next prime is 19485841. The reversal of 19485816 is 61858491.

19485816 = 294² + 295² + ... + 437².

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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57826 + ... + 58161.

It is an arithmetic number, because the mean of its divisors is an integer number (1739820).

Almost surely, 2^19485816 is an apocalyptic number.

It is an amenable number.

19485816 is an abundant number, since it is smaller than the sum of its proper divisors (36188424).

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

19485816 is a wasteful number, since it uses less digits than its factorization.

19485816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116003 (or 115999 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 19485816 is about 4414.2741192636. The cubic root of 19485816 is about 269.0953536741.

It can be divided in two parts, 19485 and 816, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 19485816 in words is "nineteen million, four hundred eighty-five thousand, eight hundred sixteen".