19853490 has 32 divisors (see below), whose sum is σ = 48257280. Its totient is φ = 5226624.

The previous prime is 19853489. The next prime is 19853503. The reversal of 19853490 is 9435891.

It is a super-2 number, since 2×19853490² = 788322130360200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1819 + ... + 6558.

It is an arithmetic number, because the mean of its divisors is an integer number (1508040).

Almost surely, 2^19853490 is an apocalyptic number.

19853490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19853490 is an abundant number, since it is smaller than the sum of its proper divisors (28403790).

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

19853490 is a wasteful number, since it uses less digits than its factorization.

19853490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8466.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 19853490 is about 4455.7255301466. The cubic root of 19853490 is about 270.7773210136. Note that the first 3 decimals are identical.

The spelling of 19853490 in words is "nineteen million, eight hundred fifty-three thousand, four hundred ninety".