20101802 has 16 divisors (see below), whose sum is σ = 34525440. Its totient is φ = 8598768.

The previous prime is 20101771. The next prime is 20101817. The reversal of 20101802 is 20810102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9068 + ... + 11064.

It is an arithmetic number, because the mean of its divisors is an integer number (2157840).

Almost surely, 2^20101802 is an apocalyptic number.

20101802 is a deficient number, since it is larger than the sum of its proper divisors (14423638).

20101802 is a wasteful number, since it uses less digits than its factorization.

20101802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2725.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 20101802 is about 4483.5033177193. The cubic root of 20101802 is about 271.9015376747.

Adding to 20101802 its reverse (20810102), we get a palindrome (40911904).

The spelling of 20101802 in words is "twenty million, one hundred one thousand, eight hundred two".