19102140 has 36 divisors (see below), whose sum is σ = 57943704. Its totient is φ = 5093856.

The previous prime is 19102123. The next prime is 19102147. The reversal of 19102140 is 4120191.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19102147) 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, 52882 + ... + 53241.

Almost surely, 2^19102140 is an apocalyptic number.

19102140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19102140 is an abundant number, since it is smaller than the sum of its proper divisors (38841564).

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

19102140 is a wasteful number, since it uses less digits than its factorization.

19102140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106138 (or 106133 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 19102140 is about 4370.5995012126. The cubic root of 19102140 is about 267.3174694447.

The spelling of 19102140 in words is "nineteen million, one hundred two thousand, one hundred forty".