19434540 has 48 divisors (see below), whose sum is σ = 56786688. Its totient is φ = 4956864.

The previous prime is 19434523. The next prime is 19434557. The reversal of 19434540 is 4543491.

It is an interprime number because it is at equal distance from previous prime (19434523) and next prime (19434557).

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 = 19434498 and 19434507.

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, 5662 + ... + 8421.

It is an arithmetic number, because the mean of its divisors is an integer number (1183056).

Almost surely, 2^19434540 is an apocalyptic number.

19434540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19434540 is an abundant number, since it is smaller than the sum of its proper divisors (37352148).

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

19434540 is a wasteful number, since it uses less digits than its factorization.

19434540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14118 (or 14116 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 19434540 is about 4408.4623169536. The cubic root of 19434540 is about 268.8591091133.

The spelling of 19434540 in words is "nineteen million, four hundred thirty-four thousand, five hundred forty".