19908973 has 16 divisors (see below), whose sum is σ = 23452416. Its totient is φ = 16548480.

The previous prime is 19908953. The next prime is 19909061. The reversal of 19908973 is 37980991.

It is a cyclic number.

It is not a de Polignac number, because 19908973 - 2¹³ = 19900781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19908943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37953 + ... + 38473.

It is an arithmetic number, because the mean of its divisors is an integer number (1465776).

Almost surely, 2^19908973 is an apocalyptic number.

It is an amenable number.

19908973 is a deficient number, since it is larger than the sum of its proper divisors (3543443).

19908973 is a wasteful number, since it uses less digits than its factorization.

19908973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 19908973 is about 4461.9472206650. The cubic root of 19908973 is about 271.0293264923.

The spelling of 19908973 in words is "nineteen million, nine hundred eight thousand, nine hundred seventy-three".