19055640 has 64 divisors (see below), whose sum is σ = 60536160. Its totient is φ = 4782080.

The previous prime is 19055627. The next prime is 19055677. The reversal of 19055640 is 4655091.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 19055598 and 19055607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2631 + ... + 6710.

Almost surely, 2^19055640 is an apocalyptic number.

19055640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19055640 is an abundant number, since it is smaller than the sum of its proper divisors (41480520).

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

19055640 is a wasteful number, since it uses less digits than its factorization.

19055640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9372 (or 9368 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 19055640 is about 4365.2766235372. The cubic root of 19055640 is about 267.1003844786.

The spelling of 19055640 in words is "nineteen million, fifty-five thousand, six hundred forty".