19973141 has 4 divisors (see below), whose sum is σ = 20661900. Its totient is φ = 19284384.

The previous prime is 19973137. The next prime is 19973143. The reversal of 19973141 is 14137991.

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: 14137991 = 7 ⋅2019713.

It can be written as a sum of positive squares in 2 ways, for example, as 5880625 + 14092516 = 2425^2 + 3754^2 .

It is a cyclic number.

It is not a de Polignac number, because 19973141 - 2² = 19973137 is a prime.

It is a super-2 number, since 2×19973141² = 797852722811762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19973143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344336 + ... + 344393.

It is an arithmetic number, because the mean of its divisors is an integer number (5165475).

Almost surely, 2^19973141 is an apocalyptic number.

It is an amenable number.

19973141 is a deficient number, since it is larger than the sum of its proper divisors (688759).

19973141 is an equidigital number, since it uses as much as digits as its factorization.

19973141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688758.

The product of its digits is 6804, while the sum is 35.

The square root of 19973141 is about 4469.1320186363. The cubic root of 19973141 is about 271.3201963199.

The spelling of 19973141 in words is "nineteen million, nine hundred seventy-three thousand, one hundred forty-one".