19492220 has 48 divisors (see below), whose sum is σ = 45765216. Its totient is φ = 6912000.

The previous prime is 19492219. The next prime is 19492237. The reversal of 19492220 is 2229491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7940 + ... + 10100.

It is an arithmetic number, because the mean of its divisors is an integer number (953442).

Almost surely, 2^19492220 is an apocalyptic number.

19492220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19492220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22882608).

19492220 is an abundant number, since it is smaller than the sum of its proper divisors (26272996).

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

19492220 is a wasteful number, since it uses less digits than its factorization.

19492220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222 (or 2220 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 19492220 is about 4414.9994337485. Note that the first 3 decimals coincide. The cubic root of 19492220 is about 269.1248297794.

The spelling of 19492220 in words is "nineteen million, four hundred ninety-two thousand, two hundred twenty".