19155942 has 48 divisors (see below), whose sum is σ = 45366048. Its totient is φ = 5806080.

The previous prime is 19155919. The next prime is 19155947. The reversal of 19155942 is 24955191.

It is a super-2 number, since 2×19155942² = 733900227814728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19155897 and 19155906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19155947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16038 + ... + 17190.

It is an arithmetic number, because the mean of its divisors is an integer number (945126).

Almost surely, 2^19155942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19155942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22683024).

19155942 is an abundant number, since it is smaller than the sum of its proper divisors (26210106).

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

19155942 is a wasteful number, since it uses less digits than its factorization.

19155942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245 (or 1242 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 19155942 is about 4376.7501642200. The cubic root of 19155942 is about 267.5682045783.

It can be divided in two parts, 19 and 155942, that added together give a triangular number (155961 = T₅₅₈).

The spelling of 19155942 in words is "nineteen million, one hundred fifty-five thousand, nine hundred forty-two".