19138806 has 24 divisors (see below), whose sum is σ = 43271280. Its totient is φ = 6102096.

The previous prime is 19138781. The next prime is 19138807. The reversal of 19138806 is 60883191.

It is a super-3 number, since 3×19138806³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19138807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22701 + ... + 23528.

It is an arithmetic number, because the mean of its divisors is an integer number (1802970).

Almost surely, 2^19138806 is an apocalyptic number.

19138806 is an abundant number, since it is smaller than the sum of its proper divisors (24132474).

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

19138806 is a wasteful number, since it uses less digits than its factorization.

19138806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46260 (or 46257 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 19138806 is about 4374.7921093465. The cubic root of 19138806 is about 267.4883961543.

The spelling of 19138806 in words is "nineteen million, one hundred thirty-eight thousand, eight hundred six".