19691950 has 24 divisors (see below), whose sum is σ = 38783232. Its totient is φ = 7413120.

The previous prime is 19691941. The next prime is 19691951. The reversal of 19691950 is 5919691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19691951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10734 + ... + 12433.

It is an arithmetic number, because the mean of its divisors is an integer number (1615968).

Almost surely, 2^19691950 is an apocalyptic number.

19691950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19691950 is a deficient number, since it is larger than the sum of its proper divisors (19091282).

19691950 is a wasteful number, since it uses less digits than its factorization.

19691950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23196 (or 23191 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 19691950 is about 4437.5612671827. The cubic root of 19691950 is about 270.0409174385.

The spelling of 19691950 in words is "nineteen million, six hundred ninety-one thousand, nine hundred fifty".