19214220 has 24 divisors (see below), whose sum is σ = 53799984. Its totient is φ = 5123776.

The previous prime is 19214213. The next prime is 19214231. The reversal of 19214220 is 2241291.

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, 160059 + ... + 160178.

It is an arithmetic number, because the mean of its divisors is an integer number (2241666).

Almost surely, 2^19214220 is an apocalyptic number.

19214220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19214220 is an abundant number, since it is smaller than the sum of its proper divisors (34585764).

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

19214220 is a wasteful number, since it uses less digits than its factorization.

19214220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320249 (or 320247 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 19214220 is about 4383.4027877894. The cubic root of 19214220 is about 267.8392702234.

The spelling of 19214220 in words is "nineteen million, two hundred fourteen thousand, two hundred twenty".