19420961 has 8 divisors (see below), whose sum is σ = 22332864. Its totient is φ = 16543440.

The previous prime is 19420943. The next prime is 19420979. The reversal of 19420961 is 16902491.

It is an interprime number because it is at equal distance from previous prime (19420943) and next prime (19420979).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19420961 - 2⁶ = 19420897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19420061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7370 + ... + 9651.

It is an arithmetic number, because the mean of its divisors is an integer number (2791608).

Almost surely, 2^19420961 is an apocalyptic number.

It is an amenable number.

19420961 is a deficient number, since it is larger than the sum of its proper divisors (2911903).

19420961 is a wasteful number, since it uses less digits than its factorization.

19420961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17191.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 19420961 is about 4406.9219416731. The cubic root of 19420961 is about 268.7964768367.

The spelling of 19420961 in words is "nineteen million, four hundred twenty thousand, nine hundred sixty-one".