19973641 has 8 divisors (see below), whose sum is σ = 20772864. Its totient is φ = 19184160.

The previous prime is 19973621. The next prime is 19973651. The reversal of 19973641 is 14637991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19973641 - 2¹⁵ = 19940873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19973594 and 19973603.

It is not an unprimeable number, because it can be changed into a prime (19973621) 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, 1896 + ... + 6598.

It is an arithmetic number, because the mean of its divisors is an integer number (2596608).

Almost surely, 2^19973641 is an apocalyptic number.

It is an amenable number.

19973641 is a deficient number, since it is larger than the sum of its proper divisors (799223).

19973641 is a wasteful number, since it uses less digits than its factorization.

19973641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4871.

The product of its digits is 40824, while the sum is 40.

The square root of 19973641 is about 4469.1879575601. The cubic root of 19973641 is about 271.3224603431.

The spelling of 19973641 in words is "nineteen million, nine hundred seventy-three thousand, six hundred forty-one".