19106661 has 16 divisors (see below), whose sum is σ = 29196288. Its totient is φ = 10887600.

The previous prime is 19106653. The next prime is 19106671. The reversal of 19106661 is 16660191.

It is a happy number.

It is not a de Polignac number, because 19106661 - 2³ = 19106653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19106611) 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, 7996 + ... + 10106.

It is an arithmetic number, because the mean of its divisors is an integer number (1824768).

Almost surely, 2^19106661 is an apocalyptic number.

It is an amenable number.

19106661 is a deficient number, since it is larger than the sum of its proper divisors (10089627).

19106661 is a wasteful number, since it uses less digits than its factorization.

19106661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 19106661 is about 4371.1166765485. The cubic root of 19106661 is about 267.3385569066.

The spelling of 19106661 in words is "nineteen million, one hundred six thousand, six hundred sixty-one".