19152661 has 4 divisors (see below), whose sum is σ = 20893824. Its totient is φ = 17411500.

The previous prime is 19152649. The next prime is 19152667. The reversal of 19152661 is 16625191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19152661 - 2¹⁹ = 18628373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19152667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870565 + ... + 870586.

It is an arithmetic number, because the mean of its divisors is an integer number (5223456).

Almost surely, 2^19152661 is an apocalyptic number.

19152661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19152661 is a deficient number, since it is larger than the sum of its proper divisors (1741163).

19152661 is a wasteful number, since it uses less digits than its factorization.

19152661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741162.

The product of its digits is 3240, while the sum is 31.

The square root of 19152661 is about 4376.3753266830. The cubic root of 19152661 is about 267.5529274838.

The spelling of 19152661 in words is "nineteen million, one hundred fifty-two thousand, six hundred sixty-one".