19672101 has 6 divisors (see below), whose sum is σ = 28415270. Its totient is φ = 13114728.

The previous prime is 19672097. The next prime is 19672109. The reversal of 19672101 is 10127691.

It can be written as a sum of positive squares in only one way, i.e., 19131876 + 540225 = 4374^2 + 735^2 .

It is not a de Polignac number, because 19672101 - 2² = 19672097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19672109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1092886 + ... + 1092903.

Almost surely, 2^19672101 is an apocalyptic number.

It is an amenable number.

19672101 is a deficient number, since it is larger than the sum of its proper divisors (8743169).

19672101 is a wasteful number, since it uses less digits than its factorization.

19672101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185795 (or 2185792 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 19672101 is about 4435.3242271563. The cubic root of 19672101 is about 269.9501554078.

Adding to 19672101 its sum of digits (27), we get a triangular number (19672128 = T₆₂₇₂).

Adding to 19672101 its reverse (10127691), we get a palindrome (29799792).

The spelling of 19672101 in words is "nineteen million, six hundred seventy-two thousand, one hundred one".