19701138 has 32 divisors (see below), whose sum is σ = 42451200. Its totient is φ = 6075216.

The previous prime is 19701127. The next prime is 19701163. The reversal of 19701138 is 83110791.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2893 + ... + 6911.

It is an arithmetic number, because the mean of its divisors is an integer number (1326600).

Almost surely, 2^19701138 is an apocalyptic number.

19701138 is an abundant number, since it is smaller than the sum of its proper divisors (22750062).

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

19701138 is a wasteful number, since it uses less digits than its factorization.

19701138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4086.

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 19701138 is about 4438.5963997642. The cubic root of 19701138 is about 270.0829100660.

The spelling of 19701138 in words is "nineteen million, seven hundred one thousand, one hundred thirty-eight".