19540953 has 8 divisors (see below), whose sum is σ = 28949600. Its totient is φ = 13027284.

The previous prime is 19540951. The next prime is 19540979. The reversal of 19540953 is 35904591.

It is not a de Polignac number, because 19540953 - 2¹ = 19540951 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19540951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361843 + ... + 361896.

It is an arithmetic number, because the mean of its divisors is an integer number (3618700).

Almost surely, 2^19540953 is an apocalyptic number.

It is an amenable number.

19540953 is a deficient number, since it is larger than the sum of its proper divisors (9408647).

19540953 is an equidigital number, since it uses as much as digits as its factorization.

19540953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723748 (or 723742 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 19540953 is about 4420.5150152443. The cubic root of 19540953 is about 269.3489250946.

The spelling of 19540953 in words is "nineteen million, five hundred forty thousand, nine hundred fifty-three".