19550830 has 32 divisors (see below), whose sum is σ = 38556000. Its totient is φ = 7093632.

The previous prime is 19550827. The next prime is 19550831. The reversal of 19550830 is 3805591.

It is a junction number, because it is equal to n+sod(n) for n = 19550792 and 19550801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19550831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6396 + ... + 8944.

It is an arithmetic number, because the mean of its divisors is an integer number (1204875).

Almost surely, 2^19550830 is an apocalyptic number.

19550830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19550830 is a deficient number, since it is larger than the sum of its proper divisors (19005170).

19550830 is a wasteful number, since it uses less digits than its factorization.

19550830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 19550830 is about 4421.6320516298. The cubic root of 19550830 is about 269.3942983718.

The spelling of 19550830 in words is "nineteen million, five hundred fifty thousand, eight hundred thirty".