19540938 has 16 divisors (see below), whose sum is σ = 40781376. Its totient is φ = 6230400.

The previous prime is 19540933. The next prime is 19540951. The reversal of 19540938 is 83904591.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19540896 and 19540905.

It is not an unprimeable number, because it can be changed into a prime (19540933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70663 + ... + 70938.

It is an arithmetic number, because the mean of its divisors is an integer number (2548836).

Almost surely, 2^19540938 is an apocalyptic number.

19540938 is an abundant number, since it is smaller than the sum of its proper divisors (21240438).

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

19540938 is a wasteful number, since it uses less digits than its factorization.

19540938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141629.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 19540938 is about 4420.5133186091. The cubic root of 19540938 is about 269.3488561754.

The spelling of 19540938 in words is "nineteen million, five hundred forty thousand, nine hundred thirty-eight".