19361961 has 6 divisors (see below), whose sum is σ = 27967290. Its totient is φ = 12907968.

The previous prime is 19361959. The next prime is 19362017. The reversal of 19361961 is 16916391.

It can be written as a sum of positive squares in only one way, i.e., 10361961 + 9000000 = 3219^2 + 3000^2 .

It is not a de Polignac number, because 19361961 - 2¹ = 19361959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19361921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1075656 + ... + 1075673.

It is an arithmetic number, because the mean of its divisors is an integer number (4661215).

Almost surely, 2^19361961 is an apocalyptic number.

It is an amenable number.

19361961 is a deficient number, since it is larger than the sum of its proper divisors (8605329).

19361961 is a wasteful number, since it uses less digits than its factorization.

19361961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151335 (or 2151332 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 19361961 is about 4400.2228352664. Note that the first 3 decimals coincide. The cubic root of 19361961 is about 268.5240035551.

The spelling of 19361961 in words is "nineteen million, three hundred sixty-one thousand, nine hundred sixty-one".