19902242 has 16 divisors (see below), whose sum is σ = 30559680. Its totient is φ = 9717552.

The previous prime is 19902241. The next prime is 19902299. The reversal of 19902242 is 24220991.

It is not an unprimeable number, because it can be changed into a prime (19902241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37793 + ... + 38315.

It is an arithmetic number, because the mean of its divisors is an integer number (1909980).

Almost surely, 2^19902242 is an apocalyptic number.

19902242 is a deficient number, since it is larger than the sum of its proper divisors (10657438).

19902242 is a wasteful number, since it uses less digits than its factorization.

19902242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 19902242 is about 4461.1928897998. The cubic root of 19902242 is about 270.9987790598.

The spelling of 19902242 in words is "nineteen million, nine hundred two thousand, two hundred forty-two".