19955402 has 16 divisors (see below), whose sum is σ = 30715200. Its totient is φ = 9720480.

The previous prime is 19955387. The next prime is 19955407. The reversal of 19955402 is 20455991.

It is not an unprimeable number, because it can be changed into a prime (19955407) 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, 11849 + ... + 13427.

It is an arithmetic number, because the mean of its divisors is an integer number (1919700).

Almost surely, 2^19955402 is an apocalyptic number.

19955402 is a deficient number, since it is larger than the sum of its proper divisors (10759798).

19955402 is a wasteful number, since it uses less digits than its factorization.

19955402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 19955402 is about 4467.1469642267. The cubic root of 19955402 is about 271.2398488418.

The spelling of 19955402 in words is "nineteen million, nine hundred fifty-five thousand, four hundred two".