19973011 has 4 divisors (see below), whose sum is σ = 21147912. Its totient is φ = 18798112.

The previous prime is 19972987. The next prime is 19973029. The reversal of 19973011 is 11037991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19973011 is a prime.

It is a super-2 number, since 2×19973011² = 797842336812242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19973071) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 587425 + ... + 587458.

It is an arithmetic number, because the mean of its divisors is an integer number (5286978).

Almost surely, 2^19973011 is an apocalyptic number.

19973011 is a deficient number, since it is larger than the sum of its proper divisors (1174901).

19973011 is a wasteful number, since it uses less digits than its factorization.

19973011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174900.

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 19973011 is about 4469.1174744014. The cubic root of 19973011 is about 271.3196076677.

The spelling of 19973011 in words is "nineteen million, nine hundred seventy-three thousand, eleven".