20109862 has 4 divisors (see below), whose sum is σ = 30164796. Its totient is φ = 10054930.

The previous prime is 20109851. The next prime is 20109863. The reversal of 20109862 is 26890102.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20109862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20109863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5027464 + ... + 5027467.

It is an arithmetic number, because the mean of its divisors is an integer number (7541199).

Almost surely, 2^20109862 is an apocalyptic number.

20109862 is a deficient number, since it is larger than the sum of its proper divisors (10054934).

20109862 is a wasteful number, since it uses less digits than its factorization.

20109862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10054933.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20109862 is about 4484.4020783155. The cubic root of 20109862 is about 271.9378732821.

Adding to 20109862 its reverse (26890102), we get a palindrome (46999964).

The spelling of 20109862 in words is "twenty million, one hundred nine thousand, eight hundred sixty-two".