19513420 has 12 divisors (see below), whose sum is σ = 40978224. Its totient is φ = 7805360.

The previous prime is 19513397. The next prime is 19513421. The reversal of 19513420 is 2431591.

It is not an unprimeable number, because it can be changed into a prime (19513421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487816 + ... + 487855.

It is an arithmetic number, because the mean of its divisors is an integer number (3414852).

Almost surely, 2^19513420 is an apocalyptic number.

19513420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19513420 is an abundant number, since it is smaller than the sum of its proper divisors (21464804).

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

19513420 is a wasteful number, since it uses less digits than its factorization.

19513420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975680 (or 975678 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 19513420 is about 4417.3996875990. The cubic root of 19513420 is about 269.2223623539. Note that the first 3 decimals are identical.

The spelling of 19513420 in words is "nineteen million, five hundred thirteen thousand, four hundred twenty".