19770961 has 24 divisors (see below), whose sum is σ = 24525504. Its totient is φ = 15855840.

The previous prime is 19770941. The next prime is 19770967. The reversal of 19770961 is 16907791.

It is not a de Polignac number, because 19770961 - 2¹¹ = 19768913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19770967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59566 + ... + 59896.

It is an arithmetic number, because the mean of its divisors is an integer number (1021896).

Almost surely, 2^19770961 is an apocalyptic number.

It is an amenable number.

19770961 is a deficient number, since it is larger than the sum of its proper divisors (4754543).

19770961 is a wasteful number, since it uses less digits than its factorization.

19770961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 40.

The square root of 19770961 is about 4446.4548800140. The cubic root of 19770961 is about 270.4016017158.

The spelling of 19770961 in words is "nineteen million, seven hundred seventy thousand, nine hundred sixty-one".