19948491 has 32 divisors (see below), whose sum is σ = 31080000. Its totient is φ = 12628224.

The previous prime is 19948451. The next prime is 19948501. The reversal of 19948491 is 19484991.

It is not a de Polignac number, because 19948491 - 2⁷ = 19948363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19948441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56985 + ... + 57333.

It is an arithmetic number, because the mean of its divisors is an integer number (971250).

Almost surely, 2^19948491 is an apocalyptic number.

19948491 is a deficient number, since it is larger than the sum of its proper divisors (11131509).

19948491 is a wasteful number, since it uses less digits than its factorization.

19948491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460 (or 454 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 19948491 is about 4466.3733610167. The cubic root of 19948491 is about 271.2085330936.

The spelling of 19948491 in words is "nineteen million, nine hundred forty-eight thousand, four hundred ninety-one".