19011420 has 36 divisors (see below), whose sum is σ = 57668520. Its totient is φ = 5069664.

The previous prime is 19011407. The next prime is 19011449. The reversal of 19011420 is 2411091.

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

It is a super-2 number, since 2×19011420² = 722868180832800, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 19011393 and 19011402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52630 + ... + 52989.

Almost surely, 2^19011420 is an apocalyptic number.

19011420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19011420 is an abundant number, since it is smaller than the sum of its proper divisors (38657100).

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

19011420 is a wasteful number, since it uses less digits than its factorization.

19011420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105634 (or 105629 counting only the distinct ones).

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

The square root of 19011420 is about 4360.2087106009. The cubic root of 19011420 is about 266.8936158258.

It can be divided in two parts, 1901 and 1420, that added together give a triangular number (3321 = T₈₁).

The spelling of 19011420 in words is "nineteen million, eleven thousand, four hundred twenty".