20501402 has 8 divisors (see below), whose sum is σ = 30779616. Its totient is φ = 10241532.

The previous prime is 20501389. The next prime is 20501419. The reversal of 20501402 is 20410502.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 1328 + ... + 6539.

It is an arithmetic number, because the mean of its divisors is an integer number (3847452).

Almost surely, 2^20501402 is an apocalyptic number.

20501402 is a deficient number, since it is larger than the sum of its proper divisors (10278214).

20501402 is a wasteful number, since it uses less digits than its factorization.

20501402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9172.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20501402 is about 4527.8473914212. The cubic root of 20501402 is about 273.6914227299.

Adding to 20501402 its reverse (20410502), we get a palindrome (40911904).

The spelling of 20501402 in words is "twenty million, five hundred one thousand, four hundred two".