20289902 has 8 divisors (see below), whose sum is σ = 30531816. Its totient is φ = 10112632.

The previous prime is 20289889. The next prime is 20289911. The reversal of 20289902 is 20998202.

20289902 is nontrivially palindromic in base 5.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15368 + ... + 16635.

It is an arithmetic number, because the mean of its divisors is an integer number (3816477).

Almost surely, 2^20289902 is an apocalyptic number.

20289902 is a deficient number, since it is larger than the sum of its proper divisors (10241914).

20289902 is a wasteful number, since it uses less digits than its factorization.

20289902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32322.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 20289902 is about 4504.4313736586. The cubic root of 20289902 is about 272.7470004652.

The spelling of 20289902 in words is "twenty million, two hundred eighty-nine thousand, nine hundred two".