19142140 has 12 divisors (see below), whose sum is σ = 40198536. Its totient is φ = 7656848.

The previous prime is 19142129. The next prime is 19142147. The reversal of 19142140 is 4124191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19142147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478534 + ... + 478573.

It is an arithmetic number, because the mean of its divisors is an integer number (3349878).

Almost surely, 2^19142140 is an apocalyptic number.

19142140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19142140 is an abundant number, since it is smaller than the sum of its proper divisors (21056396).

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

19142140 is a wasteful number, since it uses less digits than its factorization.

19142140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957116 (or 957114 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 19142140 is about 4375.1731394312. The cubic root of 19142140 is about 267.5039275051.

The spelling of 19142140 in words is "nineteen million, one hundred forty-two thousand, one hundred forty".