19672380 has 144 divisors (see below), whose sum is σ = 73504704. Its totient is φ = 4147200.

The previous prime is 19672379. The next prime is 19672399. The reversal of 19672380 is 8327691.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15780 + ... + 16980.

Almost surely, 2^19672380 is an apocalyptic number.

19672380 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 19672380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36752352).

19672380 is an abundant number, since it is smaller than the sum of its proper divisors (53832324).

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

19672380 is a wasteful number, since it uses less digits than its factorization.

19672380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236 (or 1231 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 19672380 is about 4435.3556790860. The cubic root of 19672380 is about 269.9514315931.

The spelling of 19672380 in words is "nineteen million, six hundred seventy-two thousand, three hundred eighty".