19987962 has 16 divisors (see below), whose sum is σ = 42080160. Its totient is φ = 6311952.

The previous prime is 19987949. The next prime is 19987969. The reversal of 19987962 is 26978991.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19987969) 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, 87553 + ... + 87780.

It is an arithmetic number, because the mean of its divisors is an integer number (2630010).

Almost surely, 2^19987962 is an apocalyptic number.

19987962 is an abundant number, since it is smaller than the sum of its proper divisors (22092198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19987962 is a wasteful number, since it uses less digits than its factorization.

19987962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175357.

The product of its digits is 489888, while the sum is 51.

The square root of 19987962 is about 4470.7898631003. The cubic root of 19987962 is about 271.3872904638.

The spelling of 19987962 in words is "nineteen million, nine hundred eighty-seven thousand, nine hundred sixty-two".