19672662261 has 16 divisors (see below), whose sum is σ = 30314217600. Its totient is φ = 11115211008.

The previous prime is 19672662253. The next prime is 19672662277. The reversal of 19672662261 is 16226627691.

It is not a de Polignac number, because 19672662261 - 2³ = 19672662253 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19672662261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19672662221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5261016 + ... + 5264753.

It is an arithmetic number, because the mean of its divisors is an integer number (1894638600).

Almost surely, 2^19672662261 is an apocalyptic number.

It is an amenable number.

19672662261 is a deficient number, since it is larger than the sum of its proper divisors (10641555339).

19672662261 is a wasteful number, since it uses less digits than its factorization.

19672662261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10525868.

The product of its digits is 653184, while the sum is 48.

The spelling of 19672662261 in words is "nineteen billion, six hundred seventy-two million, six hundred sixty-two thousand, two hundred sixty-one".