19914540 has 24 divisors (see below), whose sum is σ = 55760880. Its totient is φ = 5310528.

The previous prime is 19914539. The next prime is 19914571. The reversal of 19914540 is 4541991.

19914540 = 686² + 687² + ... + 725².

It is a super-3 number, since 3×19914540³ (a number of 23 digits) contains 333 as substring.

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, 165895 + ... + 166014.

It is an arithmetic number, because the mean of its divisors is an integer number (2323370).

Almost surely, 2^19914540 is an apocalyptic number.

19914540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19914540 is an abundant number, since it is smaller than the sum of its proper divisors (35846340).

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

19914540 is a wasteful number, since it uses less digits than its factorization.

19914540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331921 (or 331919 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 19914540 is about 4462.5710078384. The cubic root of 19914540 is about 271.0545861185.

The spelling of 19914540 in words is "nineteen million, nine hundred fourteen thousand, five hundred forty".