19944902 has 4 divisors (see below), whose sum is σ = 29917356. Its totient is φ = 9972450.

The previous prime is 19944877. The next prime is 19944913. The reversal of 19944902 is 20944991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20944991 = 2027 ⋅10333.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4986224 + ... + 4986227.

It is an arithmetic number, because the mean of its divisors is an integer number (7479339).

Almost surely, 2^19944902 is an apocalyptic number.

19944902 is a deficient number, since it is larger than the sum of its proper divisors (9972454).

19944902 is an equidigital number, since it uses as much as digits as its factorization.

19944902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9972453.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 19944902 is about 4465.9715628293. The cubic root of 19944902 is about 271.1922674388.

The spelling of 19944902 in words is "nineteen million, nine hundred forty-four thousand, nine hundred two".