19999701 has 24 divisors (see below), whose sum is σ = 31060224. Its totient is φ = 12355200.

The previous prime is 19999697. The next prime is 19999729. The reversal of 19999701 is 10799991.

It is not a de Polignac number, because 19999701 - 2² = 19999697 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19999501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9276 + ... + 11226.

It is an arithmetic number, because the mean of its divisors is an integer number (1294176).

Almost surely, 2^19999701 is an apocalyptic number.

It is an amenable number.

19999701 is a deficient number, since it is larger than the sum of its proper divisors (11060523).

19999701 is a wasteful number, since it uses less digits than its factorization.

19999701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041 (or 2038 counting only the distinct ones).

The product of its (nonzero) digits is 45927, while the sum is 45.

The square root of 19999701 is about 4472.1025256584. The cubic root of 19999701 is about 271.4404089680.

The spelling of 19999701 in words is "nineteen million, nine hundred ninety-nine thousand, seven hundred one".