19137940 has 24 divisors (see below), whose sum is σ = 42305760. Its totient is φ = 7252128.

The previous prime is 19137919. The next prime is 19137953. The reversal of 19137940 is 4973191.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 19137896 and 19137905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24802 + ... + 25561.

It is an arithmetic number, because the mean of its divisors is an integer number (1762740).

Almost surely, 2^19137940 is an apocalyptic number.

19137940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19137940 is an abundant number, since it is smaller than the sum of its proper divisors (23167820).

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

19137940 is a wasteful number, since it uses less digits than its factorization.

19137940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50391 (or 50389 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 19137940 is about 4374.6931320951. The cubic root of 19137940 is about 267.4843616211.

The spelling of 19137940 in words is "nineteen million, one hundred thirty-seven thousand, nine hundred forty".