19948761 has 40 divisors (see below), whose sum is σ = 34429824. Its totient is φ = 11275200.

The previous prime is 19948757. The next prime is 19948763. The reversal of 19948761 is 16784991.

It is a happy number.

It is not a de Polignac number, because 19948761 - 2² = 19948757 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19948763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 85501 + ... + 85733.

Almost surely, 2^19948761 is an apocalyptic number.

It is an amenable number.

19948761 is a deficient number, since it is larger than the sum of its proper divisors (14481063).

19948761 is a wasteful number, since it uses less digits than its factorization.

19948761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 394 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 19948761 is about 4466.4035867799. The cubic root of 19948761 is about 271.2097566777.

The spelling of 19948761 in words is "nineteen million, nine hundred forty-eight thousand, seven hundred sixty-one".