19962138 has 16 divisors (see below), whose sum is σ = 45627840. Its totient is φ = 5703456.

The previous prime is 19962113. The next prime is 19962139. The reversal of 19962138 is 83126991.

It is a junction number, because it is equal to n+sod(n) for n = 19962096 and 19962105.

It is not an unprimeable number, because it can be changed into a prime (19962139) 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, 237603 + ... + 237686.

It is an arithmetic number, because the mean of its divisors is an integer number (2851740).

Almost surely, 2^19962138 is an apocalyptic number.

19962138 is an abundant number, since it is smaller than the sum of its proper divisors (25665702).

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

19962138 is a wasteful number, since it uses less digits than its factorization.

19962138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475301.

The product of its digits is 23328, while the sum is 39.

The square root of 19962138 is about 4467.9008493923. The cubic root of 19962138 is about 271.2703646571.

It can be divided in two parts, 19962 and 138, that added together give a triangular number (20100 = T₂₀₀).

The spelling of 19962138 in words is "nineteen million, nine hundred sixty-two thousand, one hundred thirty-eight".