2142636838 has 4 divisors (see below), whose sum is σ = 3213955260. Its totient is φ = 1071318418.

The previous prime is 2142636833. The next prime is 2142636857. The reversal of 2142636838 is 8386362412.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 2142636794 and 2142636803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142636833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535659208 + ... + 535659211.

It is an arithmetic number, because the mean of its divisors is an integer number (803488815).

Almost surely, 2^2142636838 is an apocalyptic number.

2142636838 is a deficient number, since it is larger than the sum of its proper divisors (1071318422).

2142636838 is a wasteful number, since it uses less digits than its factorization.

2142636838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071318421.

The product of its digits is 331776, while the sum is 43.

The square root of 2142636838 is about 46288.6253630414. The cubic root of 2142636838 is about 1289.1878063532.

It can be divided in two parts, 21 and 42636838, that multiplied together give a palindrome (895373598).

The spelling of 2142636838 in words is "two billion, one hundred forty-two million, six hundred thirty-six thousand, eight hundred thirty-eight".