19955495 has 24 divisors (see below), whose sum is σ = 28465344. Its totient is φ = 13384896.

The previous prime is 19955477. The next prime is 19955497. The reversal of 19955495 is 59455991.

It is not a de Polignac number, because 19955495 - 2⁸ = 19955239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19955497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10649 + ... + 12381.

It is an arithmetic number, because the mean of its divisors is an integer number (1186056).

Almost surely, 2^19955495 is an apocalyptic number.

19955495 is a deficient number, since it is larger than the sum of its proper divisors (8509849).

19955495 is a wasteful number, since it uses less digits than its factorization.

19955495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799 (or 1792 counting only the distinct ones).

The product of its digits is 364500, while the sum is 47.

The square root of 19955495 is about 4467.1573735430. The cubic root of 19955495 is about 271.2402702025.

The spelling of 19955495 in words is "nineteen million, nine hundred fifty-five thousand, four hundred ninety-five".