19530890 has 16 divisors (see below), whose sum is σ = 35411040. Its totient is φ = 7755600.

The previous prime is 19530877. The next prime is 19530911. The reversal of 19530890 is 9803591.

It is a self number, because there is not a number n which added to its sum of digits gives 19530890.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5636 + ... + 8415.

It is an arithmetic number, because the mean of its divisors is an integer number (2213190).

Almost surely, 2^19530890 is an apocalyptic number.

19530890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19530890 is a deficient number, since it is larger than the sum of its proper divisors (15880150).

19530890 is a wasteful number, since it uses less digits than its factorization.

19530890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14197.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 19530890 is about 4419.3766528776. The cubic root of 19530890 is about 269.3026816380.

The spelling of 19530890 in words is "nineteen million, five hundred thirty thousand, eight hundred ninety".