19140961 has 16 divisors (see below), whose sum is σ = 23362560. Its totient is φ = 15316560.

The previous prime is 19140959. The next prime is 19140967. The reversal of 19140961 is 16904191.

It is not a de Polignac number, because 19140961 - 2¹ = 19140959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19140967) 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, 8430 + ... + 10456.

It is an arithmetic number, because the mean of its divisors is an integer number (1460160).

Almost surely, 2^19140961 is an apocalyptic number.

It is an amenable number.

19140961 is a deficient number, since it is larger than the sum of its proper divisors (4221599).

19140961 is a wasteful number, since it uses less digits than its factorization.

19140961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 19140961 is about 4375.0383998315. The cubic root of 19140961 is about 267.4984353709.

The spelling of 19140961 in words is "nineteen million, one hundred forty thousand, nine hundred sixty-one".